Mondial QV Oil Level Light Troubleshooting

I know this has been discussed many times and I've read every thread I can find already, but perhaps someone has new insight. My Mondial QV had been stored for several months and I got it out last weekend for a drive. The oil level light in the warning panel came on so I checked the oil level and found it slightly low by not quite a quart. I followed the procedure in the owner's manual for properly checking and topping up the oil, but afterwards the oil level light stayed on. I cleaned the sensor on the end of the dipstick, removed the two wires from the plastic connector and made sure they were solidly attached to the terminals, cleaned all connections, reassembled and the light stayed on. Finally I fashioned a jumper wire and inserted it in the wiring connector that attaches to the dipstick, effectively making it a closed circuit, and the light went off.

Seems then that the wiring circuit is working fine since I can close the circuit with the jumper wire and the light goes off, so the only other fault must lie with the sensor on the dipstick? Anyone have any input, and guidance for finding the discontinued electronic dipstick if that is indeed the problem?