As Mark mentioned, the Porterfield R4S pads are the way to go and I run a set myself. As I understand it, if you call Porterfield mention you are buying pads for a Pantera and ask for the rear pads with the E-brake tab already in place, otherwise you have to fab one up yourself. Last I heard just asking for the "Pantera specific" rear pads with the tab was a no-cost upgrade.
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