If Hasbro hasn't made a Theron Nett figure by now I doubt we will get one. I decided to make my own, I used a GI Joe General Hawk on a Jon Vander body. I widened the neck socket with my dremel. Do I think it looks like Theron Nett? Ehh, not quite but with the helmet on it kind of does to me. The helmet was from Hobbie and it was the only one that fit and didn't look over-sized. I repainted it, adding in the gray markings (similar to Wedge's helmet) then cut and applied the decals to the helmet.

Head: GI Joe General Hawk
Body: Jon "Dutch" Vander (The Black Series)
Helmet: Derek "Hobbie" Klivian