Twitter is only accessible via it's API (application programming interface), which is why you see so many third party Twitter products on the market. Twitter does this so they can limit the rate at which a a third party uses Twitter's content for free (it's users tweets) - there are other reasons, but that's a major one. That's why all the broadcast character generator vendors have Twitter applications.
So there's no Twitter RSS feed (they eliminated it in 2013 I believe. , unless you use a third party app to get one. Since you can't buy one you have two choices. Make your own Twitter API app, or use a free third party one.
Making your own Twitter API app:
https://dev.twitter.com/overview/documentation
Third party methods:
This is the easiest but it sounds like they have up time issues, and they might limit queries:
http://twitrss.me/ (sorry for the inappropriate language on this page)
Make a RSS feed with a Google script:
http://www.socialmediaexaminer.com/h...r-prospecting/
http://www.labnol.org/internet/twitter-rss-feed/28149/
I've never tried this Google script so I have no idea if it's safe or works well.
#XPression