door light switch replacement source

[tenedios]

I have a 1991 ZR1. All of a sudden the interior lights would not shut off with the doors closed. I discovered that slight pressure,approx.1/8"
on the outside of the right door would switch off the lights. I placed a wad of duct tape inside the door well opposite the switch and this solved the problem. I searched the registry and one post stated this was a common problem for the ZR1 and the remedy was to replace the door switch. First of all, I can not see how I can make the door close any tighter. Also I searched the net for replacement sites, such as Ecklers, and could not find a replacement. Do any members have another remedy or source for the door light switch? Thanks for your time and suggestions ! George