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ALBob, Bobsbbcards, has several of the 70 Cloth, including the Ryan. So far, I have not myself seen a second example of any of them. These and the 71 Topps Rookie Artist Proofs may be single example items; rarer I think than the Topps 61 Dice or 55 Stamps.
David---I have the 76 Cloth in two forms and would pay a premium to get one of all 4 of the different types you mention. They come up for sale fairly regularly, but usually sellers can not tell you exactly what type material they have. I envy you your backed duo.
I have a set of the 72 Cloth, and I think Bob has a scan of an uncutsheet of them