Got any links to those you mentioned above and how is their 2A stand?
Sorry, I don't.
But here's a rough idea.
Libertarian = pro-gun (this is the party Ron Paul will eventually run under)
Reform = I don't think it exists, but the most visible candidate was Jesse 'The Body" Ventura
Green = This is where Dennis Kuchinich will likely end up. As the name implies, environmental concerns are key... I'm guessing lead and dead deer aren't very popular.
Scientologist = No idea on guns, but I know they loves them some Tom Cruise.
Cyclons = Pretty opposed to civilian ownership of firearms, but they ARE dedicated to wiping out the human race.
Obviously, some of my options were tongue-in-cheek. The third party almost all gunnies will go to is the Libertarian. Which will eventually be Paul. I'm not 100% sold on Paul, either, but he's 99% likely to get my vote considering the alternatives.
Or Cylon. I'm not too keen on the eradication of the human race, but I can get behind their plank on cloning outrageously hot blondes.