The BB threads/cups are toast, or the bearings themselves? 'Cause you can replace the axle and bearings easily.... and you can retap the threads ... and you can find french threaded cups if you are diligent. If you're looking to replace it with a sealed BB, yeah, you're SOL, but other options exist. I got new bearings and a new square tapered axle for my French conversion for $12, which while not being sealed still works fine.