Here are some of the scores that are hard to find that i have found

Ones in the links are downloadable:
[Josh'sDomain - 001] Randy Edelman - Osmosis Jones(Promo Score)
[Josh'sDomain - 002] Paul Haslinger - Prom Night(Complete Score)
[Josh'sDomain - 003] Randy Edelman - Ghostbusters II(complete)
[Josh'sDomain - 004] Aaron Zigman - Step Up 2: The Streets
[Josh'sDomain - 005] Steve Jablonsky - Friday the 13th(bootleg score)