judging by his response i figure hes just one of those kids who figure "surely if i ask someone will just make it right!?"
Well you must first get the model. The lowest price i've seen for it is 95$, so there's already that to pay. Then the model must be separated into multiple parts, whether or not it was already is unkown. Then you must take the jbeam files of the car you want to meshslap the model on, rename EVERY FLEXBODY to match each model's name, and then you must also take care of the textures, the glowmaps, etc. That's easily 150-250$.
how do you meshslap something when there is like no models anywhere, old cars in general dont get many models often in games, let alone a pretty obscure bugatti
Albeit very costly, there are even models, even though those are cad models and not really adapted to beamng. https://www.turbosquid.com/fr/3d-models/3d-bugatti-type-57sc-1433214
Please tell me you are joking. You are making it seem like it would take a week or two. I have a feeling you are under 12 years old let alone 16 years old.