Custom RSS feed for each Ad author
Does anyone know of a way to create a custom feed for each author's ads that users can subscribe to? I'd like to have a button for each ad author on my site that would allow users to subscribe to their ad rss feed. I found this link which describes how to get a feed from the author's listings, but how do I create it with an author variable?
http://forums.appthemes.com/rss-feed...g-blank-15573/
Their example is like this:
http://my.localhost/author/%AUTHORNA...ype=ad_listing
In this link, if I replace %AUTHORNAME% with a username from my website, it works and I get the feed link. How can I use this in my Classipress theme install to create an RSS button per each author, depending on whose listing I am viewing? Is there a current "author" variable that I can put in the URL?