We are the only one I know of that specifically do Jet wheels (Scale) with Rubber tires like you are looking for. Everyone else is using off of the shelf tires, and making some type of stand way off scale wheel for them.

Right now we are doing up to 7" in specific Jet wheels as kits/plans/custom builts come along.

Normally though, the tires are hollow - if you require solid you could get them, but they are very heavy, and not necessary to hold the weight your model would be.

Couple of examples below - [link]http://www.glennis.com[/link]

ME-262's are 6" mains - The F-86 has 5 1/2" mains.

Dennis