News:
All 71's I've worked on, and I've had a few, all had a three prong on the driver's side and a two prong on the passenger's side.The three prong is not reproduced to my knowledge and NOS ones are getting hard to find.
I got mine for my 70 Barracuda from NAPA for like around $6.
inline tube is currently making a 3 prong jamb switch that will replace mopar jamb switch 3488442. I purchased one on eBay for $12 plus shipping. It is a well made reproduction. listed as a jamb switch for an Oldsmobile 442 Hurst Cutlass. Below is the original listinghttp://www.ebay.com/itm/161349712552?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AITTheir eBay name is motorcitysupercars and the manufacturer part number is 50557