ATSF N Scale Models produces limited run characteristic Santa Fe models used by the railroad between the 1940's and 1970's.
If you order on Shapeways you can only buy the 3D print of the advertised models. Through the website WWW.ATSFNSCALEMODELS.COM all models (plus some additional ones) can be ordered including the additional brass etchings. Because most kits contain resin castings (from 3D prints) prices are better in that case. Please consult the website for more info on building, pricing policy and history of the models.