CustomDUO Shop

CustomDUO Shop 


We will be closed 14th May 2024 - 31st May 2024

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. 


International orders welcome. For more details please see Delivery 

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. 

CustomDuo Modules


LED upgrades for Petzl Duo 

v42 (r02)

Latest version of our bench mark v42 insert for Petzl Duo. Spot and flood LEDs, 620 lumen, plus side LED. 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. 



v42 (r02)

Simple (r02)

Simple, no frills version of the v42 module. 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. 



Simple (r02)

Petzl Duo  

Petzl Duo, E63 Fixo Duo headlamp (genuine helmet fixing version, no headband). Silver battery box clasps.

These are new lamps in original packaging  with necessay helmet fixings (unused, 'old stock', therfore no longer in manufacturer warranty etc). A very rare find these days. 

We have removed the original reflector / bulbs, ready for Customduo LED conversion module (available seperately).  Discounted price available £60 if purchased with Customduo LED module, contact us.


£75    Currently out of stock  

Petzl Duo Fixo Screws

5 off large head stainless fixing screws for helmet mounting Petzl Duo. Note, these are not an exact match for the original Petzl fixo supplied screws, but do the job!  (Only run them in as far as necessary allowing for helmet thickness. If helmet has a super thin shell then it may be necessary to back them up with a washer).  



Bargain Bazaar

Petzl Duo Oval Lens

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


£8.50   Sorry, out of stock 

Petzl Duo Battery Holder 

Petzl Duo replacement battery holder and lid. 


Sorry, out of stock


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