Hey Will, I can do what you want as well, kindly check my finished projects, reviews & portfolio for more details about me.
i will trace your images professionally on Illustrator (.ai) program and each item or object (seat, text, body, ... etc.) in separated layer as you want, also will provide layered .pdf file if needed.
just if you interest with me, you can pm me and i will give you a sample as required details.
Cheers, George.