Hands Of Stone writes:

I am looking for a source for high-quality conventional cup & cone BBs
(JIS square taper). Ritchey used to still make some but they are no
longer shown on his site. Any ideas?

I don't think that anyone is making 'high quality' cup-and-cone
BB spindles any more. High quality cups can be easily sourced from
harris cyclery or biketoolsetc or through any QBC bike shop.

A high-quality BB spindle is hollow chromoly, and accepts M8 bolts.

A low-quality BB spindle is solid and nutted, aka the sugino maxy
series with the funny letter-based size-codes.

- Don Gillies
San Diego, CA