46,
I bought these thru an ebay site. Deal direct with owner at number posted to save a few bucks. I haven't installed as yet. You will need to drill out existing hole for wiper to a slightly larger hole and cut the shaft. They self park. I bought two and will try to wire to one switch. I'm thinking something like a heater rheostat They come with arms and blades capable of being cut to size. Have fun and good luck
Dan