Bryan-
I just ended up opening up the yellow pages and googled for my area, I was surprised how many plating shops there were within 10-20 miles of me and settled on one that was willing to work with me. I explained to them what I wanted, showed them pictures of my car and they've taken an interest in my project.
The reality is with the small volume of parts most of us need when restoring one car, our requirements are pretty much a nuisance to most commercial operations. That said, most shops I talked to were willing to work with me because they were intrigued by what I was trying to accomplish with an old mustang.
Greg