Art,
Leather is nice but really expensive:
http://www.928leather.com/.
2nd option is DIY, long thread, good info:
http://forums.rennlist.com/rennforums/showthread.php?t=150402&referrerid=53637
The plastic/vinyl dash covers seem to warp and unglue-not pretty
Purchase a used, slighly cracked dash: hard to find
Solution? Good luck and glad you are moving on with dash removal and heater/hose work.
John_AZ