I make bags and cases in factories in Asia, and I am looking for people who can create prototypes from our designs. Typical materials used are EVA, neoprene and nylon. Utah based services would be ideal.
A: You're looking for a samplemaker, and probably a patternmaker, too.
I'd encourage you to do some reading at http://www.fashion-incubator.com (and Fasanella's book, too) -- there are about half a gajillion ways to get skinned in the sewn products world -- you might as well avoid at least a few of them. Here's one to start on:
http://www.fashion-incubator.com/mt/archives/pattern_corrections_you_should_pay_for_2.html