The Fine Things are Always Hand Made
I looked to see if I had a better one somewhere. The second edition of E. H. Scott, the Dean of DX has a very clean, readable one, but it seems to be for the AM-FM Phantom. If the circuits are the same except for the bandswitching and the FM section, that might help you.
I have the Rider's manuals on CD somewhere, but they are encoded to be read with Visioneer PaperPort, rather than Acrobat. I don't think Acrobat will open them. They might not be any better than the copies you have, anyway.
Thanks for the tip on the book--my birthday is this weekend and I just put it on my list.
I think the Phantom Deluxe schematic will work.