Not sure where to put this, or even if anyone is interested, but I was Google-ing for some cover art, (for fun, yes I'm weird like that) and spotted a really nice scan, so went to the page and it turned out to be mobygames, now in the past scans from there were unusable due, at least in part, to the added water-mark,
However it appears as though they have now removed this mark, at least it wasn't on the couple of covers I checked, how this helps us I'm not sure, the scans might still be too low res to work with, but it could open up a lot of scans too...
usable/unusable, good/bad, I'd love to hear your thoughts!