Mark wrote:So, what do we call you? A haberdasher! Yes, I think that is the proper term.
Unless meant as humour & it possibly is, haberdasher is way off course....
The term for this type trade is usually motor/auto trimmer or auto upholster:
Motor body trimming is a trade that involves the manufacturing, repairing, and installation of all carpets, panels, upholstery, hoods, lining covers, and canopies of all types of motor vehicles. ... In addition to cars, motor body trimmers will work with boats, trucks, buses and motorcycles.
BTW nice work & it's folks like Farrell with his talent & skills getting involved in this specialist trade, keeping it from withering on the vine.
Much the same as the recent renaissance in blacksmithing & forging skills in reality TV series.
Pretty hard to demand & get paid adequately for 60 hours work/labour for one small but very intricate job!
That's the price one needs to pay to get a perfect/authentic product.