They currently don't have any floppy or CD drives. For the CD side of things, I have a Plextor Ultraplex SCSI which I think should work.
However, as for the floppy, I have a spare PC floppy drive, but I have no idea if it will work.

There's no place for the eject button, and Sparcs expect a software eject (basically) which is mapped onto one of the pins. The Sparc hardware FAQ probably covers whether you need to modify a standard cable, but it's not worth bothering.

I sort of miss mine (it ran Linux; the audio driver for those machines was mine) but it wasn't fast enough and I couldn't afford the next step up. Now i can but I just don't have the time to play with them anymore.