Welcome to CHR. I can't help you on who made your body, but in addition to the molded integral windshield posts the top of the body tying the quarters together appears to have been cut back, out and down radically to allow the seats to be set back farther? I'm curious how they handled the raised moldings that go up the sides of the trunk and blend into the cockpit surround. My '32, with a 2" stretch on the interior, has a "flat" of about 6" in front of the trunk lid, then a 1.5" raised molding tying in at the doors which appear to be gone on your car?