WOW!! Someone who actually read the rules prior to their first post!!! Well done Ol' Chap!!
Anyways, there is a Company in Ohio that bought all of Az Z car's molds. I posted the info a while back in the non tech forum. Unfortunately I deleted the email they sent me from my inbox.
If all else fails, you could always build your own set from scratch.
Good luck, and well done with raising your kid the right way.
Tim
[edit] Here is the info on the new Company that bought the molds [/edit]