These just arrived in the mail, I found a guy who does these as a hobby I think. He provides anything, from unreleased games, to homebrew, all the emulators that run on the DC & many more. All with (glossy) covers, booklets (not for all atm), printed cds, etc...
You can get this stuff completely customised with boxes, in either PAL, NTSC US or NTSC JAP style.
check his stuff out at http://www.flickr.com/photos/dreamcast/
Thanx for the stuff Gary ;))