1948 Plymouth Oil Pressure Gauge

My oil pressure instrument gauges' solder broke and caused oil to pour all over the inside of my dash instruments. I took out all the instruments and and cleaned the oil away. The gasket on the rear of the panel where the gauges go in and out is not in tact and was wondering how important it is to replace. I cant find one in any of the catalogs I have. Where can I find one? do i need one?

The gauges' copper is also bent like a hard pinch at the bottom. Could this have caused it to crack the solder? I can post a picture if it would help with this description.

Thanks!

 

here are some pictures...maybe it will help. kind of blurry.