Good news everyone! After much concern and consternation, I was finally able to locate and verify that the case casting numbers for each of the case parts match.
I was having a heck of a time finding them, and had become worried they were missing or ground off. Turns out, you just need to know where to look.
On another note, I was informed that my VW part was not the camshaft. Just the attached cam gear. So maybe the camshaft is original, or at least usable, after-all.
