I snatched up a set of 3 SCSI drives off eBay at the last minute since the price was really good. I did a search based on the information in their listing, which seemed to indicate that they would be 50pin like I needed. They arrived today, and, to my dismay, it turns out they are actually 80pin! If I had known that, I wouldn't have bought them, since I don't have anything that uses 80pin SCSI drives. But, since I now own three 80pin drives, it leads me to the real question for the group.

I know that there are adapters to convert SCSI drives, but I've heard that certain adapters are too thick, and thus make the drive unable to fit. The machines I have that need drives (and are the reason I sprung for the drives in the first place) are a Macintosh IIsi, a Power Macintosh 7200/90, and a Performa 6115CD. Anyone have any suggestions for 80 to 50 pin SCSI adapters that will fit within those particular Macs?