I am looking for a banner button plugin for Wordpress that will allow me to set up one or more unique button banners (125x125) in the sidebar for each post. In other words, I do not want to use one of the common rotating banner ad plugins. The plugin must allow me to set up different affiliate network banner ads for each post. The ads will be related to the content on the page.

Does anyone know of a Wordpress plugin that will do this?