Yay. Won an auction for a 2.3GB Fujitsu 3.5" SCSI Magnetic Optical Drive for $25. I have a couple packs of 230MB discs. Works with System 7, and the media is pretty darn reliable. Not sure I'll ever get 2.3GB discs, they're bloody expensive, but I might happen upon a pack at the surplus store if I'm lucky.

Going to use it to archive my vintage software.