We will be closed 30th Nov 2021 - 2nd Dec 2021

We are shipping to the EU as normal.  We generally post the next working day. However, delivery within the EU is slow at the moment!  Sorry, this is beyond our control, and thanks for your patience. Import charges may apply to orders delivered outside of the UK.  


The Online Shop allows payment with most debit and credit cards, without the requirement for a Paypal account. Add product to cart and option is offered at checkout. Free UK delivery available for orders >£30  (payment by bank transfer, Contact us). We are not VAT registered.


International orders welcome. For more details please see Delivery 

CustomDuo Modules


LED upgrades for Petzl Duo 

CustomDUO Shop


The Rat is back ! Single regulated power setting. Same XP-G3s LED as Omni v42 and Omni Simple modules, with foward bias flood optic. Choice of 5000k, 170 lumen or 3000k, 164 lumens. 6 hours typical operation using NiMh AA batteries. Super easy fitting. Great solution for outdoor education and activity group use for novices etc!



Petzl Duo Fixo Screws

5 off large head fixing screws for helmet mounting Petzl Duo.



Bargain Bazaar

CustomDUO Shop 


Please note that we are a small manufacturing business. Officially we work Mon-Thurs (excluding public holidays). If closed for holidays etc we will provide notice on CustomDUO calendar.

We aim to despatch CustomDUO stock products within two working days, and generally the next working day. We make every effort to keep our on-line stock availability right up to date (and generally don't get caught napping). When placing an order, please ensure that your delivery details are correct, and also that your email address is current, so that we can keep you informed on order progress.


Before purchasing any Customduo product please ensure that you have read and accept the terms

Petzl Duo Oval Lens

Petzl Duo oval lens (Petzl Duo lamp front window).




Petzl Duo front window

Petzl Duo Battery Holder 

Petzl Duo replacement battery holder and lid. 


Sorry, sold out


Petzl Duo  

Petzl Duo, modified to helmet fixing caver specification, and ready for Customduo LED conversion module (available seperately). Original reflector / bulbs removed. Supplied with helmet fixing screws. New lamps £80, and very good condition nearly new units from £50. Intermittant stock depending on current availability. 


£50 - £80    In stock, contact us

v42 Remote Control Programmer

Remote controller, configured for v42 module. Allows super easy configuration of light settings. Requires CR2025 battery (not included). Compatible with Rude Nora 3-dive caving lights. 


£3   (available at discounted price £2 when purchased with module - see v42 listing above)

v42 Remote Programmer
Basic (r01)

v42 (r02)

Latest version of our bench mark v42 insert for Petzl Duo. Now with 5 green indicator LEDs, for battery charge level indication / programming , and new integrated alloy heatsink. 4 light settings plus low output 'camp' setting. Up to 9 configurable settings. Simple user friendly remote control programming. Spot and flood LEDs, 620 lumen, plus side LED. 


Limited edition Hybrid version now available, with 5000k spot and 3000k flood.


£70   (optional remote programmer +£2)                          






Simple (r02)

Simple, no frills version of the v42 module. Now featuring two main LEDs (spot and flood), and new integrated alloy heatsink. 3 fixed level power settings, plus low output 'camp' setting and battery charge level indication. Very effective, 340 lumen. 



v42 (r02)
Simple (r02)

Petzl Duo  (brand new with labels)

Petzl Spelios - Elios size 1 (smaller headed folk and kids of course) manufacturer pre-fitted with original Duo caving light integrated into helmet. A much better caving combo than recent Petzl replacement, particularly the original Duo !!


Elios is size 1 for smaller heads. Petzl sizing is head circumference 18" - 22".  22" Bigger than 22" definitely won't fit.


Supplied with original reflector and bulbs etc removed, all ready for a Customduo LED Module if you don't already have one. 


£100  (UK delivery only)

Petzl Spelios