Search for machine shops nearby, and drop by to ask them all those questions. I'm sure they'll know.

A friend of mine had a rough drawing for something. He went to Mechanical Turk and paid someone like a dollar to create an autocad diagram that manufacturers would accept. He then went to I think Alibaba (a manufacturer website) and had someone make it for him. It was a simple wood carving thing, and he ended up getting like 50 of them (there's always a minimum), and he sold 49 on amazon to make a profit as well haha. You can do anything online these days.