Canon CY2-4312 Flash Reflector
Canon CY2-4306 Panel Packing
Canon CY2-4203 Upper Cover
Canon CY2-4226 Top Cover
Canon CY2-4259 Diffusor Panel
Canon CY2-1806 Side Cover
Genuine Canon replacement rubber side cover B for the Speedlite 580EX II.  New tape is recommended when installing this new cover, available here.