I'll probably just get the Yeti from the upcoming Cars.
Someone from another forum asked for my help finding Tex Dinoco, RPM and Bling Bling mcQueen, but as luck would have it, no sooner did I find a ton of the new Cars, I haven't seen them since. Well, I found the Tex Dinocos he wanted, finally. But not the other two.
I've seen Tex Bling Bling and RPM a few times. Tex and RPM seem to be readily available.