Supporter subscription details on dashboard


I would like a widget on the dashboard of every blog owner in my network showing what kind of subscription they currently have. In example, when they have a free subscription, they get a notice asking if they would like to upgrade to supporter, and when they are a supporter, how many days in their subscription they have left before they should make a payment again.

I did figure out how to put a custom widget on all dashboards, is their some kind of script I can paste in there to show this information to my users?