For a simple option look at the HPI vintage wheels and tyres
. The tyre sidewall wraps around the wheel to give the impression of a higher profile tyre.
If you really want a truck style wheel (and if you have a big enough budget) have a look at RC4WD
. The 1.9" wheels should fit touring car tyres, the 1.7" wheels will fit truck tyres, and they have adapters to fit them either on hex drives or the drive pin in the axle.