Damaged of spares nitro car (SG8)

I’m looking for damaged nitro RC cars or just spares. I’m currently teaching my boys how to dismantle and rebuild these kind of items for a new hobby of theirs instead of their gadgets but I only have a chassis shell and a hand controller. Ideally I need the nitro engine a receiver servos But if anyone’s got a whole car which is no good which I can use parts off them thst be really handy, thank you.