So I've been doing some digging, and I think we can rule out Gail Joner. She moved to Florida from Michigan with her family just a few months before her disappearance. That means she grew up outside the isotope map and she's probably not "our" Jane Doe.
So this might be a long shot, but I wanted to throw it out there none the less.
Diane Lee Todd: The National Missing and Unidentified Persons System (NamUs)
She went missing in April '73, so there's quite a few months between her disappearance and the discovery of Jane Doe's body. She was also...