Swedish pop music blog Sounds of Sweden has posted an mp3 of Iggy Pop doing "Punkrocker" backed by Teddybears STHLM: http://soundsofsweden.blogspot.com/2006/05/cause-im-poptimist-yes-i-am.html
I'm most familiar with the Caesars version of the track, but I guess it's been done many times over?