Pix: You seem to be under the impression that GOG do the scanning themselves. Plenty of the Ultima manuals were lifted from replacementdocs and other places if you care to check.
The dodgy Serpent Isle clue book scans in your link were done before I got hold of a book scanner and there is a newer and far better scan in the downloads page on the same site. You will also find an identical pdf of the Ultima 7 guide you mention which was there long before the game ever appeared on GOG. I think that one might have been donated to me though so I won't take credit for it.
I do have to agree that GOG ought to get these missing manuals included, wherever they get them from. I'm sure there are plenty of us Ultima fans willing to help out if needed.
Yes, I was. Upon reading your reply, I have since looked at and download your new, and superior scan of "Balancing the Scales" (as well as the Hi-Res colored scan of the Serpent Isle map). However, to be honest, it is not as good as the "Key to the Black Gate" scan (granted, it was donated to you, and the quality of the Part 2 Cluebook scan may have been lessened due to the design of the book itself) but if it is, in fact, the best digital representation of the cluebook available, then I'll count my blessings and take what I can get. I didn't mean to offend anyone, and I apologize. Still, I concur, and believe that it should be in GOG's best interest to add the missing "extras" (resources, items, whatever you want to call them).