ebay or custom or the new asics keirin
i rock these, they're super narrow. my 43.5's feel like 9.5 (i had to stretch em) so these probably equal 9's or less. super stiff, great for pedaling, not so great for skidding/skipping (always feel like i'm gonna slip out of the pedal/lacks pedal feel) and are hard to get into the pedal cages for some reason that i don't really understand.
http://tinyurl.com/yuetvz
10 and 1/2's!
http://tinyurl.com/39bk6a