Looking for good affiliate plugin

I’ve looked at several WP affiliate plugins, and have yet to find one that suits my needs.

I need a plugin that BOTH allows me to customize links AND images. This is almost a home grown affiliate program. There are over 100 “offers,” and I need a plugin that allows me to turn specific ones “on and off” at will.

Right now, I have to go into each individual post where the offer appears and take away the link.

I have the internal link building plugin running for text links, which is an easy fix and works perfectly. But I don’t have anything that keeps all the images links in a tidy place.

Any suggestions? Even if there isn’t one plugin that does it all. I REALLY REALLY need an image linking plugin that allows me to change image links from a central location.

Any help would be GREATLY appreciated!