a way to add an outline back on to a shape once orignial outline has been deleted?

Hi all

I've just realised I've made a fairly big error!  I created shapes using the pen tool and filled them, then when i was tweaking them the outline didn't move with them as i didnt double click, but i had thought it didn't matter as i didn't need the outline, so I've then deleted all the outlines.  Any how, I've now just realised i do infact need those outlines!!  Does anyone know of a way i can add the outline back on?  Ideally I don't want to have to draw everything again.  I was just beginning to animate, so i have conerted everything into symbols too. 

Any hekp would be appreacited!

Thanks

x