The most reasonably priced component used on the Gsf600 1999 (x) (e02 E04 E17 E18 E22 E25 E34) / P37 Cam Chain is the Bolt.
Check out any of the twelve Cam Chain components enlisted.
Some items from this specific schematic: Spring, Adjuster Assy,tensioner, Gasket (nas), Chain,camshaft Drive.