Singlespeed & Fixed Gear - Rear brakemount tail light??

I just saw someone ride by with what appeared to be a very bright led (red) in their rear brakemount. Are these available for retail, or do i have to make it myself? My gf has a rear-brake mount frame; this would be pretty cool for it.

i haven't seen a rear brake mount tail light available in stores (that doesn't mean it doesn't exist though, just not that i've seen), but used some cheap p-brackets once to mount a blinkie to a rear brake mount before. it was nothing fancy; lined up two p-brackets, and snapped the clip on to them. it didn't last in my case, but i'm sure someone could whip something up that would work better.

I use a strip of velcro to attach my blinkie to a flipper-fender that I cut to half-length.

Rear reflectors on 80's road bikes almost always come mounted to a little brakemount bracket. I used to ride around with my Cateye LD1000 mounted to a 20 year old Cateye reflector bracket. :D I stopped that only because I didn't want someone to steal my light.

Knog frog maybe?

you can buy brake pads with pressure sensitive LED's that light up when you brake.