Yes, provide a generic skin for each car with a white blank space for writing in the different drivers name, and another blank space on the skin for the number. In photoshop its a 30 second job to change the name/number, save as a different jpg, move on to the next one.
10 drivers, 19 skins, 190 x 30 secs = 95 minutes £45/hr = £71. I do accept paypal.