i've looked into the SNES archive. there are no sources. there are, however, compiled binaries.. in a weird format. and, also, for the mega drive.
looking at the mega drive ones, the header information seems to be there? but it's not in the right offsets it should be. which makes me wonder if this is somehow in a slightly compressed format, or a format for some esoteric devkit. i can't really get much else out of this and wish someone else would look at it
ah, well, GAME, SOAKER and VIEWER ROM dumps for mega drive already existed here http://www.iancgbell.clara.net/elite/demos/index.htm
those are most likely the same ROMs just formatted different
GAME does not have a SNES version, however SOAKER and VIEWER do. i don't understand much about the SNES ROM format but those aren't in the same format emulators expect either
so the mega drive ones aren't a mystery anymore, but the SNES ones still are