I got mine from Greg at RT Engineering. He is a member of the board and helpful for all things dash related for your E body.
I have replaced my tach innards, a clock that keeps actual time without draining your battery and other parts. My dash was in excellent shape but time does take its toll. Now it is just like the day it left the factory.
Craig

http://rt-eng.com/mediawiki/index.php/Main_Page