Your link is to the guy I bought mine from on ebay. These are reproductions and anyone can tell the difference between these and OEM. Its not to say these are bad. They are not. They are about the best repros I have seen so far, but no one yet has mastered the contours of the original panels.
If you can wait there is a very good project going on herehttp://www.fiero.nl/forum/F.../HTML/030265-25.html
Lots of reading, but PokeyFiero is attempting to fully reproduce the panels. It is not easy and will take some time.
As far as finding a NOS panel. They periodically show up on ebay but as the previous poster said you will never get one for your price range. You may, however, post in the Mall for a good used one. Someone will have that I am betting.