Thanks Charlie, I'd seen them all except the first one (illum shell). We're gonna go with yellow, it's the only color that seems to be "out there" in the explorable universe. I've seen pix of one that was pretty crusty which looked to be corroded black with copper driving bands, but not enough info to get "close enough" for a repro. Sucks to be yellow, but it is what it is...
Thanks!
Russ