Hey Steve, thanx 4 the address you posted, thats the source! Bought some last year for a "special project" w/ the restoration of the prototype CB750 but lost that contact info. The screens look remarkably similiar to gutter leaf screens from a hardware store!
That "special project" was to replicate the exhaust heat shields on the prototype- the prototype shields had cut-outs w/ that same side cover screen material inserted instead of the usual black paint. Its supposed to be a secret, but its just too juicy a secret to keep forever....