Factory appearing Tall Valve Covers?

[Newman]

Does anybody out there make factory appearing BBC valve covers that will clear race roller rockers? I'd like to give my father's race motor a factory appearing look (valve covers and air cleaner, plus correct decals) before he puts it in his 70 Chevelle Wagon, and also we'd like to put roller rockers on our 427 for our 69 Camaro? I've seen valve cover spacers before but never the tall covers... Has anybody used the 1" spacers? Do they work well?