User blog comment:Ashleii/Where can I find the INSTRUMENTAL south park credits?/@comment-4381012-20130904011830

https://www.youtube.com/watch?v=L76gmreYu18

Here is the original instrumental credits theme (as in, from Season One/Unaired Pilot). If you want to download the theme, a quick Google search should give you a Youtube-to-MP3 site.