More on the continuing saga of the inherited compressor........

Finally managed to track down an exploded view of the compressor and found
out that I am missing a couple of reed valves........now I know I can buy
them, but am wondering if I can just make a couple.

From what I understand they usually are comprised of spring steel, so
todays questions a

Typical steel gauge?
Are they a flat unit or do they have curvature to their shape?


Any thoughts on this topic would be much appreciated....thanks. :-)