How about business that successful work has been carried out on Z cars for restoration purposes: EG: Trimmers, interior door trims, seats, Dashboards, carpets, roof lining, Etc;
Engine Modifications: Cams, Heads, rebuilds, etc;
Carburettors, manifolds/extractors/exhausts. 4 pot calipers discs.
Suspension: springs, shocks, bushings, steering.
Paint shops, panel repairs, fabrication of replacement steel parts.
Metal polishing for engine parts, wheels etc;
Steering wheel finishers.
Rubber suppliers.
Lynton