Most likely, having someone to bend tubing to your spec will be $$$$. That is, unless you have designed the tube size and radii to their available tooling sizes.
Anyone who does roll cages can do this. But you don't necessarily have to look locally. Many of us have used Rollcagecomponents.com to provide our roll bars. They are very competitive and pretty quick considering they are building one-off tubes. They provide the tubing too. I have no personal connection. yadda, yadda, yadda.
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Chuck.
“Any suspension will work if you don’t let it.” - Colin Chapman
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