those hubcaps look like the ones off of the 60's & early 70s Toyota Coronas! The early hiace vans also had them I think....

I had an old 1966 Corona shovel nose as my first car... with 4 wheel drums and ancient suspension they were lethal! Not a pinch on a Datsun 1600. I also went through 4 engines in that thing (so much for Toyota reliability!).

How about original 180B hubcaps for the ratwagon! They'd look great on the 13s, although they'd cover all the red on the wheels.