so i'm looking for a global wysiwyg widget editor that will

so i'm looking for a global wysiwyg widget editor that will let me create/edit a widget on the top level multi site and then show up on all the sub sites.... i have 300+ sites and to edit the same widget on 300+ sites is a real pain!... i was looking for some way i can create a widget area on each site that is edited in the network admin/sites..so that it would 'push' to all the sub sites...