Here is a partially working savestate of Act 7 on our champion emulator. These tiles are from DOS version and saved back as raw bitplane data and loaded by hand. Don't leave Act 7 because the tiles will be overwritten if the disk is in. Some tiles are misplaced and missing for now.
I would say there is a fair chance to repair this level if someone could discover how to pack Page6.raw.
EDIT: Savestate and picture replaced with corrected tiles. Act 7 looks OK with these tiles.