The upholstry in my TR3 is pretty decent but old. The driver's seat seams now are splitting in the "pleats" (not edges). The material itself is not torn or split but the thread has given up its job of holding the "pleats" together. Is this repairable? I've still got some things I'd rather do to make the car better before upholstry. EG has anyone taken the original type material off to have resewn?