3D Models for Truck Builder

I require some 3D models for a 3D Truck Builder. Please note the 3D models are required to be life like models and not illustrations. There are different stages required within the builder such as wheel base and cab which all need to update the truck image when options are selected. Initially I require 1 truck only with several options and 1 or 2 optional extras models. These models will need to be in the correct format so yhey can be added to a programme that will allow people to customise a truck and body