@ Sarah
I’m thinking any template with a category drop down could meet your requirements…
One option could be to put your sponsors in the category description on the Connections : Categories admin page. When a user selects a category, the category description would be displayed above the category the user chose. YOu can decide it this option will suit you by directly visiting a category. Load you site in a browser and type in a URL something like this:
http://domain.tld/directory-home-page/cat/category-slug
The category slug can be found on the Connections : Categories admin page. Make sure you have the Category Description option enabled on the Connections : Settings admin page under the Display tab.
In regards to the option you suggested, yes, there is a way to limit based on category. See the doc page for the category shortcode option. If you decide to go this route, This FAQ for cMap may be of interest. This FAQ will work with any of the templates with a category drop down.
I hope that helps!
