Some items from this specific schematic: Boot,caliper, Disk,fr, Spring,pad Stopper, Cap-breather.
The most reasonably priced component used on the En450a5 454ltd 1989 Usa California Canada Front Brake is the Cap-breather.
The sub assemblies and components that make up this Front Brake include this Caliper-assy,fr,lh, the most expensive part.