Have you tried nibble mode in x-copy? Also, try the cracked version of PowerCopy by Stingray:
http://eab.abime.net/showpost.php?p=753776&postcount=9 but not sure if it's copylock as well?
I've got IPF's of Elite, original release and v2.0 so depends which version you need. If you have a Kryoflux you can write the IPFs back to disk for a 100% backup.
Update: I've created an extended ADF in WinUAE and copied each of the IPFs to it using x-copy nibble and the eADF loads, I can get past the manual protection and get into the game! So, use x-copy in nibble mode and it should work! I also checked the copy with the Elite WHDLoad installer but it errored on track 78 saying No sync signal? Same happened for the IPF too!!