The model is a kit produced by Kaslo Shops Distributing, part number SK-5. The kit is not actively sold any more, but you may be able to pick one up on eBay. I bought mine on eBay from the owner of Kaslo Shops (I guess he was clearing out his inventory). The kit is well packaged. It comes with all the parts needed to detail the interior as well as the exterior of the cabin car. It does not come with decals, couplers, trucks, or wheels. I have received e-mail from people complaining about how the parts had warped. Mine had none of these problems and it was a nice, clean kit to build.
(external link: Kaslo Shops)