hardly, cos every WRC or R5car can be made ONLY from a manufacturer. it was a long time ago when you had so much great workshops or tuners (especially in Italy) who were able to build a great group A rally car. I used to knew a guy who was making dogbox gearboxes for Andrea Aghini in his Lancia days. Man, that gearbox costed 60 000DEM, which is today 30 000€