Need to find replacement switch

Hi,
I've searched the threads but have been unsuccessful finding the answer I'm looking for. The level indicator switch on for the freshwater/gray-water/battery charge is bad on my panel located on the cabinet below the sink. I removed the switch and touched the wires together a few weeks back when we took our maiden voyage, and the battery level checked out fine, the gray water tank level went up to 2/3 full, and the freshwater tank registered empty (it was). I checked the switch with an ammeter and there is no continuity when the switch is pushed, so I know it's the switch. I checked radio shack for a replacement but they did not have the same size switch. Does anyone know who the manufacturer of the panel is or where I can find a replacement switch? I called Trailmanor a few weeks back, but the parts guy was on vacation and he never called me back. I just called today, and he is out giving a tour so I had to leave another voice mail message. I really want to get this fixed soon as we will be going on another trip next weekend. Thanks in advance.
Tony