Available for ?.?

I run a few automotive sites and what I would like to see (unless of course I have missed it somewhere) is if I have 20 cars, I woudl like to list parts available by car for example.

Im sure this would extend outside the automotive industry too.

I would envision a Make / Model table with all teh varients in it, and when you add a product you can select which models it is available for.