Head - Scalpel (modified)
Torso - Sand Viper
Arms - Snake Eyes (modified)
Waist - Ripper
Thighs - Sand Viper
Lower legs - Snake Eyes
First, let me say the lack of the snake helmet is intentional. I think one of the greatest flaws (but admittedly, most memorable characteristics) of Serpentor was that huge gold melon.
As always, please let me know what you think!