Here's a catalog of them: http://cheesyguitars.com/musima_1973_catalogue.html
According to the site, they are still around but make acoustics only.
There's one on Ebay right now if someone is desperate for one: http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... 0323646073
FYI: I can't find anything on Musica Musicinstrumente however.