I took a bit of a gamble to see if this turn Signal Switch I see all over eBay would work for our trucks and to my surprise when it arrived in the mail, it actually worked. It plugged up without any modification whatsoever, although I do recommend replacing the grease with something better. The intermittent wipers do make a clicking sound every time they engage, but they work nicely. Build quality is quite reasonable for less than $50 bucks. Part number is MB571632.
https://www.ebay.com/itm/28543000352...mis&media=COPY