Well, I found a cassette (bleh) put out by Old Homestead Records, but otherwise, I, too, have only ever seen them on CD compilations (well, and 78s, of course). Here's a link to the Old Homestead Records website, although OHCS 191 seems to be missing from their catalogue. But it looks like you can buy it here, if you want.

Good luck... I'd like a CD of this, too, dammit.

---Lepus Rex