hey marvin,
the guy who runs goat hill is the same guy who runs subclub, you could send him an email and see awake he is...I haven't touched base with him in a coupla years, but I think he's still slitting and selling.
The minolta cassettes are still around, you need to be careful as to source, however. There's a guy on ebay selling aftermarket cassettes made out of some sort of epoxy that don't fit well and don't last well and leak and are best avoided. His come pre-loaded with film that is also sometimes suspect -- it has remjet backing, or some such.
There are Russian cassettes that were made for Russian imitations of the Minolta cameras, they fit the russian cameras but not the minolta cameras. However, minolta cassettes will fit the Russian cameras. The russian cassettes are ok. If yu buy a Russian outfit you usually get two cassettes with it. The cameras are not bad -- they are copies of the Minolta 16 and some even have a focusing lens, which is a plus.
So you are best off, if you can find one, buying a minolta caseette -- as long as you are careful you only need a couple, they don't wear out. Last time I priced them they were around $10.
As to film, Mr. Goat Hill sells film, but you can actually slit your own if you are even marginally crafty -- I built a slitter years ago out of razor blades and blocks of wood, the sort of precision you need on Minox film is not necessary with Minolta, "pretty close" is good enough -- or you can buy (or used to be able to buy) 16mm movie film. The cameras are designed to use movie film that is perforated along one side. Unperforated film works great too because the cameras don't use the perforations.
should you really really REALLY want to shoot, are willing to find film and just need a cassette, drop me a line. I have small stash. Or look inside your camera, sometimes one is lurking there, forgotten. Once or twice I bought a camera on ebay and found a cassette inside it, forgotten.
or you could go naked -- it is actually possible to load one of those cameras in the dark without a cassette -- just coil the film, put it in the feeder side, tape the film to the take-up spindle on the other side, close the camera and away you go.