I used to own an SP808, and I was able to talk to a lot of fellas online through the SP808yahoo groups. Try it out, http://www.groups.yahoo.com then do a search for SP808. Some of those guys will know where you can get a manual.

There is also a FORUM specific to the SP808, but I don't have the exact URL. But I always found the SP808yahoo group to work best.

Good luck.