I just got mine, custom made by Mike Taylor_Katy Tx. WHAT an awesome bit of work he did. Pics posted in alt.binaries.pictures.woodworking for you inspection.
These are in native cherry, he made the totes extra tall with a cutout at the top where the horn is, for the lateral lever, and made it deeper from front to back for my larger hand.
The knob is the high type yet made to work on the very old Baileys where the base meets the bed without a ring around the outside. The base fits around casting that goes up into the knob's base. The tops are extra wide, again for my large hand.
The reason he can do custom work without further charge is because he doesn't have pieces made, he creates when an order and payment comes in. I think anyone should consider this man's work: