This is the best I've got. I know it's bad, I'm sorry, but holy crap this scheme was above my skill level.
Base: Me
Sig: NCRD1331
Template: FCRD, modified by NCRD1331
Number: Big Evil Racing
Logos: Google
Link: https://www.mediafire.com/file/ywz3isn31j9lme3/48+bowman+static.tga/file
Instructions: Post the .tga file into the folder C:\Papyrus\NASCAR Racing 2003\exports_imports, then import it onto a car by going into Opponent Manager, then hitting New, naming your car, hit import, and import your new car in! Make sure to save.