Check out any of the seventeen Camshaft - Lower Rocker Arm components enlisted.
Some items from this specific schematic: Sp A, Rocker Arm, Bolt,flange,6x28, Oil Seal,6x14.5x5, Arm Rocker Low B.
The Roller,5x8.5 is the lowest priced item on this Camshaft - Lower Rocker Arm schematic.