It is typically easier to find a manufacturer if you are able to show a visual or functional model. Talking to an engineer to draw a model is a decent first step. But, I would recommend calling a model shop. Model shops typically have the ability to create files, and have the experience to know to draw the product with production in mind. A lot of times engineers will draw a part with no consideration to how it is going to be formed, so it ends up having to be re-drawn. Not too big of a deal, just a bit of wasted time and money.
Let us know if we can help.
Centerline Models Inc.
Visual Models, Prototyping, and Finishing
a: 602 Sidwell Court
Saint Charles, IL 60174
p: 630.668.4343
w: http://www.centerlinemodels.com
e: scott@centerlinemodels.com