Pull out a magnifying glass and you should be able to see a brand name an part number on the side of the switch, I have had to replace two of them, those blade terminals just break off from the weight of the wire harness, I found the exact switch on Amazon
Take the switch out and read the numbers on the switch. Google those numbers and most of the time they will come up for sale from several RV part sites. They run around $10 to 15 bucks. I had to replace the use/storage switch and got it from amazon really cheap. You should have no problem getting this.