Give these guys a call. I've worked with them for 30+ years, and they really know their stuff. When I needed diaphragm material for an antique outboard motor fuel pump, they had exactly what I needed.

http://nashvillerubber.com/

Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!