I had made a small modification and made it possible to add links to Spotify in the albums. I simply replaced the buy-link since i dont need it.

http://luftkaffe.se/meduza/Diskografi/E/index.php?searchword=&format_id=1&option=com_muscol&search=albums&view=search&Itemid=
http://luftkaffe.se/meduza/component/muscol/e/2-eddie-meduza/202-garagetaper-

This should be standard in Music Collection. Everone uses Spotify today and dont need to download or buy!