Dome light issues

The bulb socket is shorted
I think I see whats wrong, I started looking for a new one (ordered one from eBay) and I noticed the new ones I saw all had the fiber washer and mine does not have one. I figure it must have been brittle and broke when the previous owner had it. I will try a gasket and see if that works. Heres a pic of what i have...20200105_120822.jpg