I have been updating Alexandre Fausini's 1950 through 1966 carsets. I originally did the carsets menu artwork. I have updated 1950 through 1963 with complete artwork, helmets, carskins with individual numbers, cockpits, pitcrews, and banners. I have also included carshapes with each year I update. Currently working on 1964 carset now, about half done renumbering carskins.
You will find them and some of the carshapes on this site. Check out Season Packages. All are for GP3 version 1.13.
Richard J