This Pump Assy.,air is the most expensive of the items that make up this Air Pump assembly.
Some items from this specific schematic: Filter (b), Pump Assy.,air, Cable,clamp A, Filter (c).
The most reasonably priced component used on the Gl1500 Goldwing 1988 (j) Switzerland / Kph Air Pump is the Bolt,flange 6x18.