The most expensive part in this assembly is the Frame.
The most reasonably priced component used on the Gs500e 1991 (m) (e01 E02 E04 E15 E16 E17 E21 E22 E24 E25 E34 E39 Frame is the Bolt.
Some items from this specific schematic: Frame Set(gray), Frame, Spacer(6.2x9x7.5), Bolt.