The pump is fitted with 26mm gears and 8mm flange designed for use with up to 1970 3 bolt camshaft. Here's a new 26mm HD aluminium oil pump.
Oil Pump 1300-1600cc 4 Rivet Camshaft 26mm VW Beetle Type 3 T2 Bay
T2 Camper Oil Pump 26mm 3 Rivet Camshaft Type 2 Bay Window Van
Aumotop Transfer Case Oil Pump Saver Plate Durable Replacement for NP246 NP261 NP263 NP261XHD, Easy Installation for Reduced Repair Costs, Fit NP136 NP246 NP261 HD Owners
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LTHERMELK 200cc Oil Extractor Pump, Oil Suction Pump for Car Engine Oil Change & Brake Fluid Extractor, Manual Oil Pump Extractor with Hose, Automotive Oil Syringe for Liquid Transfer – 0.21qt
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