tirerack.com has lets you preview wheels/tires on cars. They used to have 69 chargers and 70 challengers but I think they're revamping their photo collection because the pictures sometimes are unavailable. Worth a shot though.
Also, If you have a side shot of the car and a side shot of the tire I can try to photoshop them. Im not great shakes at it but I'll see what I can do.