I don't think you can order them direct from Robart. I tried; in fact, I called Robart to order 630s and 639s and that's when they told me about the gear made for the KMP B-25. Since I had Robart on the phone, I tried to order from them. They said no, I needed to call KMP.

Regardless, once I get the gear, I'll post info about them here. I'd want to order direct from Robart, too, if I had a discount coupon.