The most expensive part in this assembly is the Washer O-ring Kit.
Some items from this specific schematic: Washer Sealing 8, O Ring 59.6x2.4, O Ring,18.1x3.6, O-ring,7.8x1.9.
The most reasonably priced component used on the Gl1800a Goldwing 2003 (3) Canada / Cmf Gasket Kit B is the Washer,plug Drain 14.