How to create a customizable brand reseller program?

[CosmoGlo]

We would like to create a Brand Resellers Program where the other brand can host our products on their website, and the sale links directly back to our store. We are struggling with the logistics of how to do this. We found the "buy button" option, but we are looking for a more customizable version that isn't so basic. We have also tried searching the app store, but havent had much luck with that either. Some sort of widget maybe? We would also like to be able to track their sales so we can provide a commission. We plan to work with multiple brands, that also use shopify and ones that use a different platform as well. 

How do we even get started with this?