I bought these amazing boxes they're exactly like dvd boxes only not as tall. So you roughly have a bit smaller box then a psx box and about the same size as an dreamcast box.
There is place for 1 disc, but 2 fit on the same spot (fit well, the don't losen)
A manual can also be stored, I tried PSX and DC manuals and they fit with ease.
I included some pictures (click to enlarge)
I put the original dreamcast cover from the original box on it, and it's doesn't even look that bad. But the front cover isn't big enough. The PSX cover is just a bit too big to fit, but with some cutting even that could work.
I bought these cases for my Dreamcast games, a lot of them are busted. The cd is loose in the case.
I bought it in Europe from this store:
http://www.mediapack.eu/p/9755/9761/CD_DVD_GAME_dozen_Game_dozen/Game_case_Playstation/Playstation_box_single_PP_black_with_clear_foil_carton/XR00001&lang=GB
