https://www.redhat.com/apps/store/desktop/
Not sure if they've released 5 as a Enterprise Linux Desktop yet, but that is most likely what you're looking for, geered more for the non-business or home users who want support.
But like previously mentioned, if you don't want support, just download CentOS 5 which is essentially Red Hat stripped of it's logo's and all the other perks you get when buying it from Red Hat.