just a long shot: icyclesusa.com has a number of Ritchey spindles for sale that *seem* to be intended for a BB with pressed-in bearings, and they are pretty cheap. You'd have to measure all the variables before you order, but these look like high quality spindles with regular ISO tapered ends, so if one will fit your bearings and your shell, any ISO square-taper crank will fit the spindle...worth a look.