Yes they do make them with exposed coils, I just found this:
http://www.gibsonstrings.com/pickups/classics.shtml
"The '57 Classic features Gibson's special Alnico II magnet, vintage enamel coated wire, nickel plated pole pieces, nickel slugs, maple spacers and vintage-style, two-conductor, braided wiring. The '57 Classic is available with genuine gold-plated covers, nickel-plated covers, or open coils".