Mercruiser Spark Plug Wires

Gotta get set of new wires, but I be damned if I can find a Merc/Quicksilver part number for my '81 260 w/points ignition. Not even sure if they're available.

Can anyone give me a bit of guidance? In the alternative, can someone recommend some high quality wires (other than Sierra - those are shot after 2 seasons).

Thanks!