Mr. Sigman, you are THE MAN!!!
It's ordered, hopefully the number I had was accurate; I believe it to be.
Just under $50 shipped, an expensive little bastard. Too bad, I'd have bought several if they were around half that. But with what I've spent so far, I didn't want to button this motor up with the worn, brittle one I have. Before long, I'd have been pulling the pan & digging the remnants out of my oil pickup...
Thanks to everyone for the helpful responses.
As for the guide, I'm still gonna work on finding an easily-modded replacement that is more readily available, like maybe the Quad-4 parts mentioned above.
I created an account there; that place might be a gold mine. I'll certainly send others in their direction, the guys over at tempotopaz.com should find them useful.