Recs for custom road bike builder (build around 650c wheels)

I am looking for recommendations for custom road bike builders.  I would like to have this bike built upon 650c wheels.  I am 5'5" female (29" inseam- read: stump legs).  It seems like all of the road bikes out there that are built on 650c have very small frames (for folks around that 5' mark).  I am obviously too tall for those.  However, I ride a 48cm Cervelo P3 with 650c and absolutely do not want a 700c bike.  I used to own a 51cm P2 with 700c and it always felt too big; like the bike was riding me.  Handling was not nearly as crisp and intuitive as with the smaller bike either.  I want a properly sized frame for a road bike built upon 650c wheels.  I would like carbon fiber, but would entertain titanium.  This bike would be my group ride bike, occasional hill ride bike... and if it was that sweet, maybe I'd use it in a half-iron.

Any recommendations/suggestions would be greatly appreciated.  Thanks!