A lot of us here started off "welding challenged", but there is a sure cure for it!!
If you're on the West Side,
Blackbird Fab Worx could be an option. Or he might know someone who would.
I don't know anyone out East here.
Your options really depend on your time frame and the depth of ones pockets! Check out the local Drag Racing groups. They are regular tube frame producers.
Cheers and welcome to the mad house!
KS
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Check out
Firearm Finishes & Coating for options to ceramic coat your Locost parts. Hundreds of stock or custom colors including Chrome and Clear Coating options now available! High Temp options for hot bits!! Plastics too!!
Never become a pessimist. A pessimist is correct oftener than an optimist, but an optimist has more fun, and neither can stop the march of events.-Robert A. Heinlein