A jewler I am doing some business with in Austin just told me of J.E. Cauthen & Sons in Fredericksburg, TX.. I have not been in but seems to have some very nice doubles and from the website, looks like it would be a nice place to poke around. http://www.jecauthen.com/

There is also McBrides Guns in Austin, TX. https://www.mcbridesguns.com/
Always a few consignment doubles and they stock some current makers new offerings..