Regarding NCATS Die Cast. I contacted Motorsports Authentics last year to inquire if there was any plans to make die cast or anything else for the Canadian Tire Series. The answer was no, not at this time. It is the responsibility of the individual teams or Series to commission their own souvenirs. Beyond Digital Imaging does carry some novelty items for some of the teams. They were receptive to allowing me to carry these items in my store. I haven't followed up on this yet though. Another company (I can't remember the name) has the rights to the NCATS Series apparel. Any item can be manufactured if there is a demand.
Crappy Tire had (has?) a Gibbons diecast and Home Hardware had Thompson Jr diecasts. Not high quality but ususally around $20.
On the model note, I came across this web site. Hours and Hours of browsing. There are also some custom NCATS models that people have made.
http://www.ovaltrackmodels.com/index.html
You used to be able to get the odd CASCAR diecast.
For example I have Don Thomson's, Pete Gibbons', Mark Dilley's, Cole Pearn's, Chris Fowler's, Al Turner's, Pete Vanderwyst's, Paul De Jong's and 2 of Robin Buck's (the 15 & 66 cars). Duke Sawchuk's car has eluded me, I missed out on it on Ebay. 🙁
If you're lucky you might still find the odd one on Ebay, or perhaps hiding in a corner at Cdn Tire, Home Hardware or Giant Tiger. I found my Pete Gibbons car that way, and I remember seeing a Don Thomson car once in the Home Hardware store in Caledonia.
There's a few guys out there that make excellent models too! Good luck!
Not an NCATS one, but I did find a Patrick Carpentier diecast at Zellers from the 2007 Montreal Busch race!