If you want to go with a stock look, Jon B at PartsRack had them for about $500 last year. They may have gone up in price since then, but that's what they were last year.
On a 1993, a 1996 black dash will fit if you don't like the gray. Also, if you order a dash, make sure you get the glovebox too; those are separate.
The stock dash is referred to as "fuzzy" because of the finish Chrysler used on it. I think I've heard oven cleaner (someone please correct me if I'm wrong) will get the fuzziness off.
I personally liked black better, so I wet-sanded and primed mine, then handed it off to a guy with a booth and gun to respray. Then I just used some vinyl spray from Pep Boys for the remainder of the parts. I like the look of a matte dash better, but there are some other options in this thread:
http://forums.viperclub.org/rt-10-gts-discussions/615788-painted-dash-pictures.html
Here is mine (before I rewrapped the seats):
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I've had no experience with overlays.
I hope that helps...welcome to the club!