Can I get a custom jaw implant without being exposed to a CT scan?

Dear doctors, I already had a (full body I think) CT scan when I was 17 years old. I’m 21 now, I’d really like to get a better jaw shape and was considering implants, but the fact that I need to be exposed to additional rays of a CT scan only for aesthetic purposes is holding me back. Can an MRI or normal X-ray still do the job? (I suppose they’re not 3D images but I’d even be keen to pay more for it). Thank you very much.