We provide a great deal of support for librarians who are willing to take on the effort of supervising our practicum students. We have been most fortunate over the years in having a large number of excellent librarians give up some of their limited time to provide this experience for our students. If you can find someone in your community who will do this for you, then we will provide all the support needed to make it happen. Most of our distance students are able to find someone who is fairly close to them. Some people do it on weekends and after work throughout the whole semester.
Some people do it via a flexible arrangement with their work.
Any way that you can make it work is fine so long as your site supervisor approves. You need to be doing something which adds to your knowledge rather than simply repeating the experience you currently have. If you really think you can make a case for that, then you can talk to me about it when we meet. If you have a year of experience as a full-time professional in a library, then you can apply for a practicum waiver. Even people who can do that, however, still take the practicum.