I used to be able to buy them in pairs but Ford discontinued the parts and now the only way to get gaskets is to buy complete overhaul sets and then the gaskets are composites. 
I have a 360 and a 390 that will be headed to the machine shop soon but my Edsel blew one the other day on the right side and now the left side is showing some weakness and getting a little noisy. I don't wish to install composites anymore but do prefer the steel ones. 
