Metal cd sales

I found this news item today and it got me wondering. Is there somewhere on the net where you can find out how many copies any cd (eg. Forbidden - Forbidden Evil) sold. It would be interesting to see and compare. I can't find anything on the soundscan website.

http://www.roadrunnerrecords.com/blabbermouth.net/news.aspx?mode=Article&newsitemID=82936

Soundscan didn't come into existence until 1991, I think...

Also, not all labels/outlets report to Soundscan...espeically in our scene...

Good luck...I bet the labels themselves can't tell you how many CD's sold...