My window lift bracket rivet broke. I got the new rivet from R/T Specialties. Bought 4. I took the door panel off and all seemed to go ok. My question is: Should there be a gasket that goes between the bracket and the glass? There were no remnants of a gasket on the glass or in the door cavity I found the bracket and old rivet. The FSM page 23-27 show a gasket in fig. 71 that looks like it would wrap around the bottom of the glass. I think the glass should be cushioned from the metal. is there a gasket available?