Where can I find a USB powered 5 1/4" floppy drive?

Episode 1080 (2:14:14)

Torry from Floyd, VA

Torry has been a programmer since he was a kid and he has a bunch of 5 1/4" floppy discs with his original programs on it. Where can he get a USB drive that can read them? Leo says that at this point, eBay may be the best bet. But it's quite possible that he may not be able to get one that's USB powered. The challenge is going to be that it uses a serial interface and he'll have to have an adapter in order to get it to work.