What if the cars you race blow their engines all the time and you can't find anything on the market you like? You start your own company and build stupidly fast yet affordable cars, that's what.
The British sports car industry is a beautiful phenomenon. Take Radical for instance. Started by a guy who dropped out of school at 15 to become a self-made engineer, the company grew to team of 140 employees, building the fastest and most rev-happy racing cars on this side of the planet that you can even drive to the track and back without spending a fortune on maintenance.