I don't know of any custom locks, but I suppose you could use multiple sets....different manufacturers should have different keys.
Say the key that was stolen was for a set of Gorilla locks, you could add a second set of locks from Chevy, or vice-versa.
I've never tried this, but it should give the thieves a nice little surprise if they swing by your house trying to steal your wheels too.......and while they're wrestling with the second set of locks, it would present a nice target for a load of buckshot up the a$$. I'd think this should satisfy your peace-of-mind, at least temporarily.