For the early FOX GT's that run the GT Embossed side molding, there are no buy 'new' replacements. I imagine this is due to copyright issues with the Ford 'GT' logo. Our's were in pretty rough shape but decided to tackle them and see how 'new' we could make them. Quite pleased with the final look.
The ones on this car had been painted with Black trim paint covering the entire molding. Not sure what approach to take to save the GT part, I just went to town with a grey scrub pad. It worked!
Basically, the light grey look of the GT part is embedded deep in the rubber, so take liberty in just scrubbing it clean without fear of removing any color. I used water and a grey scrub pad to clean it up.
I then used some liquid masking material to cover the GT area before paint. After applying the SEM Grey paint, I then removed the mask and all is well.