I remember the great
http://www.pinkfloyd-co.com used to have them, but they're long gone from there, and I never got the chance to hear them all, and would like to hear how my favorite Floyd album developed throughout its various stages.
I have some of the demos and can offer you one Russian site where you can download them ALL. If you have problems with this site, I'll help you, only tell me what service you prefer.
You can find most of them on YouTube
ive got them i guess i could upload them if u want.
OOh please! I would love all you have of the demos!