Temporary "Roller" wheels for project

[Firebird-Geek]

I am on the hunt for some temporary wheels that I could mount while doing paint and fabrication... car would not be driven with the wheels... just Rolled around.

I am still doing the quarter panels and other fixes so I would rather order my final wheels when I can get some accurate measurements after everything is finally welded together. Plus, I would rather weld/grind/paint the car without the expensive final set of wheels and tires on the car.

Problem... I need 17" or above to clear the Wilwood brakes, plus 1/2 wheel studs.

I figured it would be easy just to go to a junk yard and get some... WRONG. Hardly any vehicle I find uses something that would work. I did manage to track down some 5th gen Camaro 18" steel wheels.. with 245/55/18 on them. They are almost new and the guy wants $400 for everthing. I REALLY hate spending that much on something that will not stay on the car, for this is a budget build.

QUESTION: They are a 28.6" diameter.. will they fit? Anyone else find a better/cheaper fix?

Thanks for any advice...