This isn't a general engineering forum. This is a forum intended to support teams competing in the FIRST competition. We don't work with flow rates and pressures near what you're talking about, so you're less likely to find specific reccomendations, however there are a lot of experienced engineers around. You might find a good stepping stone to what you're looking for. That said, the best I can offer is a link to
GlobalSpec
There you can find a list of pnematic valve suppliers, and if you register with them, you can filter the catalogs of some suppliers according to your needs.
EDIT: Come to think of it, you'd probably be best served by just calling SMC America at 1.800.SMC.SMC1