Hi, My name is John. A few years ago I went through the same thing.I was missing the entire top framework on mine. I was very fortunate to find an original 30 top framework with complete original wood bows. The bows were badly weathered but were not warped. The person I got them from cut them in half for easier shipping. I made myself a wood bending jig from a pattern from these old bows and made myself some new ones out of oak.I messed up the first one but all the rest turned out perfect once I solved the problem of not allowing the wood to stretch when bending . cutting to the chase, I think I still have the old original bows somewhere, I know I have two of them but I am not sure if I still have the front header one .Will check when I get a chance,