Thanks for your input.
I guess I shouldn't be too surprised that keycaps aren't super easy to find. Maybe Bob over at Northgate Repair will have something. I'll have to check with him tomorrow.
I do have a Lite-On SK-0002 that I could get a shift key from. I'm typing on it right now in fact, and I do believe I heard it cry out plaintively as I wrote that last sentence, lol.
Fortunately for it, it also has the supersized enter key, so no 1.5W backslash. I'll move on to another donor.
Another possiblity is to steal a complete keyset from another Alps board with the same layout. I think I've seen Omnikeys with Dell AT101W keycaps on them, but that's quite a step down in quality and appearance in my opinion.
I guess I'll find out more when this Omnikey arrives, but I am still curious to know what's going on with the switches for those two missing keys on the board. They have a funny appearance, and it almost looks like half of the switch housing is missing, yet the profile is pretty uniform and matches on both keys. I'm really not sure what it is I'm looking at though. It's a rather low-res photo.
Still at just under $37 shipped, I think it was worth buying this 101. Hopefully I can get it cleaned up and restored with a little work and hunting of parts. It would be a shame to see it sit unused.
Eric