I've been looking for one of these for a while, too. A yard about an hour south of here wanted $350 for a 5831B (same as the one Jolly has 2.35/1.00/0.85). It was from a 60's GMC IIRC.
There is a place in Toledo, Ohio, that can sell you a new or used one. I've never called to find out how much they want, though. I think it's called Goody's truck parts.
What I am curious about is, how much torque can these things handle? I want to use one in my GMC, and I hope it could at least tolerate a mild SBC rebuild, without breaking and causing me to track down expensive and hard to find pieces.
