Helmet: Custom Cast Part
The Rest: Marauders Task Force Parts

It's a shame that Voltar wasn't a bigger part of G.I.Joe lore. I think he's a great figure. He's sort of a successful Major Bludd. He had a great familiar in the condor bird. His colors, although definitely not standard Iron Grenadier colors, were memorable and distinct. Unfortunately his character is sorely lacking. His filecard doesn't really mention anything other than that he was really god at being a mercenary. I don't have comprehensive knowledge of the Marvel comic books (not after issue #27 anyway), but I don't recall Voltar getting fleshed out much.
I decided that my character of Voltar would be Mediterranean and have a darker complexion. Also I gave him some streaks of white in his hair making him older...more of a war-horse.