In the process of "enhancing" our '88 Excella 25 bath vent with new screen, I managed to destroy the little rotary switch with round plastic knob that controls the on-off noisemaker fan under the up-down aluminum dome.. Switch appears to be 1/2' in diameter, with plastic claws that retain it in small hole at side of vent screen. It has pair of wires attached, and turns from on to off to on in 360 degrees..
None of local home center places carry anything similar. Seems like a common "RV Parts" item, but no luck at Camping World.com or other sites.. Any suggestions for part number or source??