Ok, I apologise for bumping a rather old thread, but in light of the original question: there is a way you can officially get hold of digital copies of Wolfsbanes demo tapes. And all three are available from their own site for, let's be honest here, a fairly reasonable price.
I have not tested the quality,but I'm about to download it now. I'm also going to buy tickets to see them at The O2 Academy in December. Apparently, it's their last ever London show.
Edit: quality is as you'd expect from a bunch of demos. The begining of the live version of "Paint the Town Red" on Wasted but Dangerous has the same sort of effect you may expect from a screwed up tape that I thought was only on mine, but it's on that as well.