I checked mine out and the letters are gone too.
I redid the letters on my '92 with Tire Lettermate. It took a few coats but looked good and lasted about 2 years. I'm going to do it again.
Here's an Ebay link:
http://www.ebay.com/itm/Trimbrite-T1...2f97fb&vxp=mtr
You can probably get it at Advance Auto Parts or Autozone also.