I have what you need buddy! Four rim boxes up in my rafters in my garage. They are all yours if you come pick them up!
These are Work VSXX wheels, I am pretty sure the guy that gets them would **** a whole house load of bricks if I just slapped cardboard on the faces.
That may be true, but if you've ever ordered from TireRack, you'll get your wheels/tires shipped in the exact same way. They sell a pretty high volume, and it seems to work for them. They have thick, circle cut cardboard and they use a bunch of plastic bands to hold the cardboard to the faces. I reused some of their cardboard to ship a set of BBS wheels earlier this year.
I got some different sized double wall boxes here at work I can give you. I have some 24x24x12 (id) double wall boxes here that should be big enough. Let me know.