Go and check out the
CAPS project. They are busy making backups of original Amiga games,
including the copy protection. CAPS backups can not be freely distributed (yet).
There's no way to write the backup back to a disk yet, but they're working on that. in the meantime, backups created by CAPS' tools can be played with UAE.
You might want to check the Games in their "Wanted" list. If you can supply them with a Game they still need, you'll get the CAPS image in return.
