How much do you need? I've got a left-over 3' x 4' piece of dead-soft .022" thick copper sheet (flat, not rolled). I don't remember where I bought it- probably Ontario Metal in Rochester. I'm in New York State, and have no idea of best way to ship it, nor the cost. I'd probably never use it (quit making my own gaskets), so wouldn't need much money for it. If you could use them, I've got a punch & die I made for cylinder holes (engine bore was 3.965", so punch is probably 4.000"- need to measure it)- could make you a good deal on it.