Trying to find an engineer or Garage worshop to undertake the work will be very difficult,
Non standard materials are reqd and specific cables if braking is reqd, sourcing the materials will take 3 times longer than the job it's self, I contemplated doing Pammy's MG, but the problems are many fold, materials /plasma cutting/cosmetics etc, Take it to one of the known Manufacturesr preferably the A frame maker
I would use Towtal, a 230 mile round trip from where you are
steel plates, M12 nuts/bolts, 9in angle grinder/hacksaw, tin of paint. no problems.