I totally get the draw of old vintage hardware. I spent months trying to track down the weird, unique and ultra-proprietary 2.5" HD that goes in a Mac PowerBook 130, found a NOS surplus store that had one, and they wanted $210 for it. I looked on eBay and saw an entire working 130 with MacOS 6, Microsoft Works and a bunch of other stuff bundled with it for $100 BIN. So I gave up and bought some needed upgrades for my desktop PC...!

So, while it stings, you're probably better off with USB addons in terms of moving data around.