Here in Aus, for any vehicle pipe work ( brakes, clutch, fuel, copper, flexible, high temp racing or normal), I often use Pirtek a hydraulic vehicle specialist and as long as they have or are given the correct end fittings they seem to enjoy making small specialised parts to your design at a reasonable price. Alternatively, a local workshop that works on classic cars should have the pipe work clamping tools etc and be familiar with the fittings as they would be doing this work all the time.