I would buy an alignate mold and cast kit (non-toxic, non-irritating, quick setting 3 or 4 minutes). After you have your cast, you can scan it in high detail on a turntable. Congrats and good luck!
EDIT: A kit like this is good: https://www.amazon.com/Luna-Deluxe-Prints-Casting-Pearl/dp/B003MU2FNK