As I said, the theme component that I linked would need to be modified to work for deep links–it was specifically developed not to work for deep links. As a theme component, it works in the browser. This has advantages of not needing to rebake posts when affiliates are added, removed, or changed. You’re welcome to contact me or ask in Marketplace.
A plugin could be better since it wouldn’t be re-writing the URLs in the browser, but it would be more complicated since it would require rebaking posts when a change was made affecting those posts. Maybe $1000 +/- $500?