I get most of the stuff from Tognar Toolworks ( http://www.tognar.com ). I am not even sure that you can get this stuff from the local dealers. Even if you do, I believe that express delivery from Tognar would still be cheaper.
Jim Dienes in Frisco, COL. Precision Ski. If you ask Jim for a 1/2 base and a 2 side he will do it and hand finish it, but you have to ask and talk to Jim.