I have heard that you can get plugins from onlywire that links you to directories.. I have a video that shows that the you can get to this link thru wordpress plugin tab , but I guess I am so new at this that I can not find this tab in my Dashboard. Can some on help!!!!!
If you require that kind of access then your best course of action is to hire a web host and download a free software install for self hosting from wordpress.org. http://support.wordpress.com/com-vs-org/