I used to get Air and Space magazine and it had an article on people who rebuild Merlin v12s several years ago. It was pretty cool but they were saying parts were getting harder to find. Luckily for them, they made a lot of spares. Can you see going into Kragen and asking for a Merlin V-12 head gasket kit?
I figured with all of the c&c machines it would be a matter of drawing it in cad and cutting it on the machine. I image the rubber parts would be more tricky. Any way, I am very excited at this find. Too bad the US didn’t bury our inventory rather than destroy it.