Actually, since they were a dealer zone promotion they weren't 'built' as 500 Specials at AMC. They would've come down the line like a regular production AMX. The S/S AMXs were consecutive serial numbers, maybe you're thinking of those.
Sorry, but I can't help you with a Rim-blow wheel restoration recommendation. I'd like to find somebody who can do the '69 woodgrain steering wheels. From what I hear the woodgrain rim is pretty difficult to restore.

Anybody out there know of a really good steering wheel restoration that can do the '70 Rim Blows or the woodgrain '69s?