In the next version of the site we added possibility for linking vehicles in several cases:
- same vehicle re-used
- same role (may be the same vehicle, may not)
- following the role of another vehicle (e.g. "improved" version of a car)
- simple reference to another car (parody, etc.)
- stunt double
- archive footage

Maybe we could add a plate field, but that's a lot of work entering plates each time (and if it is not done each time, it has not much use)
So for now we chosen not to put such field, the "link" feature is useful for finding linked vehicles.

And if you ask me when this new site will be available, I'll reply as always: when it will be finished. We do not often work on it, so it takes a long time