RE: Evo 4-5 shells
HPI makes an EVO 4 or 5 body. It's a 200mm rally body, so if you're using a 190mm (electric or newer Tamiya nitro) chassis, you'll need offset wheels or spacers.
Tamiya make an EVO 6 and 7 body, both 190mm. However, if you don't have a Tamiya chassis, you'll have extra holes in the body since they come pre-drilled.