Sounds like a 6903 bearing to me. You can get them from Phil Wood for $19 each.
Tom Dalton wrote:
> Just got back from the local bearing supply place
> where I was trying to buy a replacement cartridge for
> an OMAS titanium BB that I picked up at the D.C. Gear
> Exchange. 42 bucks for one cartridge. Yikes! That's
> for plain old ABEC grade one, precision stuff is
> really expensive. So, grasping at straws here, does
> anyone have a replacement cartridge bearing for an
> OMAS "Bib Sliding" ti-boneium BB? Mr. Bike, I mean
> As an alternative, if anyone knows where I can get a
> more reasonable price on a 30mmx17mmx7mm
> (ODxIDxthick.) bearing, please let me know!
> Tom Dalton