Hey, I have one of those too... forgot to mention it in my comp's description.
It's not hard to obtain one; just look in a scrap heap or a yard sale and you're bound to find an old comp with one.
However, I'm not sure whether C64 disks will work in it. I know for a fact that Apple ][ disks don't work due to some hardware incompatibility; C64 disks could be totally different too.
Unless you were referring to the Amiga and not C64; those could work.