Single groove pulleys and alternator hardware

Okay, after digging through a bunch of boxes, I figured out that I already have a single groove crank pulley. I'm needing a matching single groove water pump pulley.

According to BPE, "Fits '70-'91 A-Engines w/ aluminum water pump, '87-'91 3.9L V-6 Engines, Magnum Crate Engines, All w/ or w/o P.S. & w/o A.C." and looks like this...