http://www.mars-tech.com/aec-7720u.htmThese things go for cheap on eBay all the time.
Scott, to use that adapter, from what I know, you'll need a Mac that uses ultra-wide SCSI, and I'm pretty sure those compacts and pizza boxes don't. You'll have to check the Apple service manuals.
No Mac ever had built-in ultra-wide (68-pin). Wide SCSI wasn't even out till 1994. An ultra scsi (50-pin) adapter should work just fine though, the Mac will simply run it at the old SCSI-1/2 speeds instead of Ultra. Parallel SCSI protocols have always been nicely forward-backward compatible, you just have to adapt for the physical connectors.
