.
Kosmisk Väg is/was run by Peter Henning who also runs Sprachlos Verlag and is one half of Amph. His contact address can be found here: http://www.sprachlosverlag.com/p/contact.html - a friend of mine ordered a couple of KV cassettes (along with a few other items) from him last autumn, so there might still be some left for sale.
I'm pretty sure Mr. Henning never had anything to do with Kosmisk Väg - it was runned by Andreas Malm, the other half of Amph, and another guy as far as I know.
Maybe, maybe I got the two confused. All I know for sure is my friend ordered the KV cassettes from Peter Henning, so I guess that even if it's an indirect route, it works.