I found a cheaper Fashion Royalty knock-off body from China (Meng company) and it's the same clothing size as Barbie and Fashion Royalty, as well as having Barbie sized feet, fits the shoes, as well as East 59th and Industry shoes.
If you've ever wanted to have an action figure girl's realistic head sculpt or celebrity face, but didn't want to start all over again buying bodies and wardrobes & shoes, this is a way to merge what you've got.
Scroll down to the bottom of my tutorial for the updated section on the Meng bodies, read the description and click on the first photo in the gallery at the bottom right to get the details: Action Figure Tutorial UPDATED