Kaylaindy,
Kurvers Schietsport in the Netherlands has them. Although you can only purchase from him by wire transfer (not credit card), Fred Kurvers is a fan of the K1, is an expert on it, is very helpful, and he has some unique accessories for it that you might be interested in. He also has the latest version of the Huben bullets, which are made specifically for the K1 but can be hard to get. I haven't heard of anyone getting better results with any other pellet or bullet than can be achieved with the Huben bullets (but then, I don't hear a lot). I've only just arranged to buy a K1 from him, but the experience so far has been good. He's been courteous and patient with my ignorance and my obscure sense of humor (I don't think he gets half my jokes, partly due to language barrier and partly due to, well, as I said...).
Good Hunting,
Airgunneer