Ok, I went and bought a nitro setup for my stouts/porters... before I invested in this, I called my local gas supplier (airgas), who assured me they sold beverage gas mixes. When I got my tank and went in, they told me they couldn't fill a 5lb nitrogen cylinder with beverage gas. They told me that they would have to take my cylinder and ship it to St. Louis to do that, and that I would have to pay all charges.
I am not aware of any other venders of beverage gas in our area (unless someone in the Peoria, IL area knows something I don't).
So I guess I'm going to have to serve under straight nitrogen following force carbonation. Any ideas, tips, tricks would be appreciated.....