If you are a fan of old style P.S. Olt calls, especially the D2, then check out this Lincoln Nebraska call makers stuff, Doc Calls.
http://www.doccalls.com/I have both his D2 and "Suzie". Both in green acrylic. After years of blowing RnT's, these are the only two calls on my lanyard now. Doc will tune them however you want and cut you extra reeds to change tones, loudness, etc. He will also try his hardest to talk you out of using acrylic :-(
One of my favorite wood calls is a small cocobolo single reed call made by Ron Wieneke (also from Nebraska). It doesnt look like much, but man that call sounds good. I still use it every once in awhile and the mid to late season ducks really like its smooth, mellow tone.
Dustin