I've seen Meddle, the double lp w/ "Be Careful With That Ax Eugene ( Ummagumma ?) and Atom Heart Mother. Actually, I just saw a copy of Meddle less than a month ago. I'm sure you could go to one of their fan sites and get a listing of what came out on r2r. Some groups like that were released on 3 3/4 and 7 1/2 ips so if you just see a slow one, don't give up.