From the few pictures I could find it looks like there is no solid mount but rather bands that wrap around the cooling fins at the back of the light and the vents in the helmet, is that correct?? Simply gluing an alloy Gopro mount to the bottom might be the cleanest option (if you can find an appropriate permanent bonding agent). If you could provide a picture of the bottom of the light it might help in coming up with some ideas but it looks like custom is your only option.Love my Trail LED lights. I have a XXX and DS. I would love to mount the XXX to my handlebar and having trouble with options.
https://www.action-led-lights.com/collections/everything-else/products/gemini-o-ring-setTrying to find the thread about the mounting o-rings. Can't find it. Need another set.