Head-Swamp Viper
Torso-I cant remember. I can tell you it was an Eco warrior, and was originally orange.
Arms-Corps!
Crotch-Dart Spytroops
Legs-Blowtorch JvC

I dont know if another person has ever made a custom of this figure. When the Stiletto first came out I thought it was awsome, and i really liked the figure. But as time went on he lost his luster. Heres a link to the original http://yojoe.com/action/88/starviper.shtml