Mike, uncured Spanish chorizo?
The problem seems to be that there is little demand for this particular sausage, so the fresh sausage makers don't make it. I'm sure that lots of our many, many fine sausage folks would do so if given the recipe and a large enough order.
Looking for fresh choizo, I've seen references about uncured chorizo by the very good LA Spanish sausage company la Espanola. It does not look as if they ship uncured meat, however.
I also saw that the really top-notch Rioja sausage maker, Palacios (probably what you bought at Sam's, and available at Iberco, La Unica etc.) sells uncured choizo in the UK (that's the EU for you; we get Mexican stuff, which seems more than fair). Still, I'm unaware of a local source for fresh Spanish-style chorizo.