Spanish model producer Electrotren made models of the first Amtrak Talgo trainset in HO and N. ER Models imported them before they closed shop. Eurolokshop.com might still have some, as they import other Electrotren products. I have a set, and it looks and runs really nice. I should add that the model is of the leased prototype brought to the US for Amtrak to run, and so does not have the decorative “fins” that the Cascades trainsets have.
As to Amtrak’s Talgo set. There is a model available from a company called Electrogen, imported by ER models. Walthers did have these a year ago, perhaps they don’t at this point.
Ay yi yi . . . scooped again! There is a bunch of stuff about engineer/inventor Alejandro Goicoecha on Google – pity so much of it is in Spanish I can’t read.
Most likely it is his matronym, which is very commonly used in the Spanish language (often hyphenated) when referring to a man’s name (Mr. Goicoechea’s mother, in turn, would be named Sra. Oriol de Goicoechea).