This comes up every so often. How "authentic" must they be? The stock arms & blade supports are late '60s Jaguar but literally any arms that takes the same size wiper drive spline will drop on. The arms are usually stainless steel and can be (carefully!) reshaped with a vise, a Crescent wrench or even Vice-grip pliers. I've found wrecking-yard Jags, FIATs, other British cars and even some mid-80's Chevys that fit the Pantera wiper-drive posts. Sorry- don't have the arm length measurements handy but from most junkyards, these are so cheap......
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