Button fell off my Magcshine!
 

More accurately, the little rubber cover that weatherproofs the button fell off. No idea where or how; I got off the train at Euston, put the lights on, rode a couple of miles to Waterloo; gone! I've had the light over a year, and it's great, I guess I could re weatherproof it with duck tape, but I'd rather replace the actual item. Anyone know where it might be found? (Online that is. I'm not asking you to locate it halfway down Kingsway. Although if anyone can.......)

I thnk your best bet would be to contact Geoman and see if he has a dead unit he can cannibalize for parts. DX surely isn't going to be any help, and I don't think anyone sells small parts.

contact geoman. The oring on my light broke and they shipped out a new oring the next day. Excellent customer service!