|Best guy I know of for custom work is R&J in Apex, straight down 55 about 10 miles from you. 919-362-6630. Robert is the welder and fabricator and had done custom headers for us on a number of cars. He'd have no trouble doing what you wish.
For a good general purpose shop that I am sure can handle what you wish and is close to you, McNair Performance, 27617, is on the edge of Durham/Raleigh just off 70. Definitely close. Ask for Grover (Jennifer will probably answer the phone), he is a SCCA racer and we use him for alignments and some other stuff, like cramming 225 size tires on tiny 13" Jensen Healey rims. Yes, it works.
And, in Durham for anything British - Flying Circus English Cars. They have worked on many a Jensen, and have done some work on my Turbo Esprit as well as by buddy's. They do good stuff and could handle it I'm sure. 919-596-4250.
I live in Cary but work in Durham, let's have lunch sometime or maybe I can meet you at the Circus sometime if you wish to meet Toby, Max, and those fellows.