I'm working on a show model -- a highly detailed O-scale 1890's passenger car -- and I'm up to the interior. I've tried various techniques for modeling the luxurious seats typical in First Class cars of this era, mostly very elaborate fabrics in "overstuffed" upholstered seats that more resemble couches than benches. Anyway, my current candidate for the representation is to take a bare cast metal seat (Keil-Line) and to model the upholstery by molding Sculpey clay into suitable cushion shapes. But I've got on the order of 16-32 of these to make [depending on the final seating configuration which isn't settled yet] and that's a humongous amount of handwork. Duplicating a few pieces by casting is a natural way to replicate them but I'm not really sure I want to tackle as my first casting project a bunch of 3D objects like coach seats. Are there any services which will do small scale custom casting for a reasonable fee?