Of course, it's sacrilege, but a Kaypro 10 has a WD1002-HD0, which is basically a WD1002-05 minus the floppy portion, if you don't need the floppy.
Just make sure the carcass goes somewhere nice
Yes, in the Tandy hard drives, we used to have to align the VCO every 6 months or so on most customer's units. Don't recall ever having to replace one though.
I take it yours has failed. If you get me the part numbers off the part and I have them in my stock of chips, I'll repair your board.