Another fantastic model from the line up of Replicazz from Railscale33d. This N scale Western Star 4800 can be purchased as a kit, where components like rims and tyres will have to be painted and glued together. Alternatively, it can be purchased assembled and painted in any paint scheme (depends on complexity)
 
This kit contains
x1 WS 4800 Cab
x1 WS Chassis
x2 Rectangle Fuel Tanks
x2 Steps
x1 Bull Bar
x1 Rear Bumper 
x2 Front Rims
x4 Rear Rims 
x2 Front Tyres
x4 Rear Tyres
 
A video is available on how to assemble these Replicazz Kits (see below link)
https://www.youtube.com/watch?v=o3_w8Y2iamg&t=3s
Available as well are various detail parts that can be bought separately and fitted, to give your model a true one off look