Wonderful idea and great suggestions.. how large of a tumbling blocks pattern are you wanting to make?
At the Quilt Expo in Knoxville, there was a lady who has a shop out of her house doing nothing but making the papers for English Paper piecing.. She gave me a sample and I will see if I can hunt it down and get some info for you off of it. If I don't find it my friend who was with me got one also, I'll check with her.