New to this and this seems to have alot of info.
I've been looking for a stx front bumber and the thunderbolt side skirts.

 

Although they don't list it on their website, you might contact Hillbank Motor Corp to see if they still have the side skirts.

Roush Ranger Body, engine components & Suspension Parts.

 

Okay will look into that and contact them thanks helps alot. Any other sources would help also.
For the stx front bumber does anyone know if some places still sell them

 

Not sure about the STX bumper/valance... might try eBay. Hillbank bought all the remaining inventory of the Roush Thunderbolt parts. Only other way to get those would be to find an individual parting out a Thunderbolt (yeah... good luck). I wish you the best in your search! :)