I have a training site that manages the same content across several branded versions. 

examples:

 - .com/product-name-a
 - .com/re-brand1/product-name-a
 - .com/re-brand2/product-name-a






Where all 3 are the same content. 

In a perfect world, the "product-name-a" would only exist once, and if updated, shows globally. 

I feel like this is in the re-write API relm, but unsure since I don't actually want to re-direct, just display the requested page in the requested URL.