I just completed a pretty thorough restoration of my 1989 C1500 Reg cab with Silverado trim, YE9 code. I went to replace the rear speakers and managed to break the two pillar panels and the upper panel that holds the rear of the headliner, and the panel that goes across the back underneath the rear window. Does anyone know if and where replacements are available? They are discontinued through GM and it seems Ecklers and LMC don't carry them. Ideas?