Actually, I have seen a lot of them. And the "Survivalist" mentality is not as much "Right Wing" as it is "Libertarian". And not all "Libertarians" are Conservatives. And if you want a good example of this, look to the Anarchists.
Firearms for survival
Which Type Of Survivalist Are You? - Daily Anarchist
ModernSurvivalOnline.com » Guest Post: On Becoming a Gun Loving Liberal
I have traveled on the fringes of the "Survivalist" movement for many years, and realized long ago that they come in all flavors. Right-wing, Left-wing, Racist, Anarchist, and all flavors in between.
In fact, I think the largest and most serious "survivalist" community in the country is not even political, but religious. Just ask some Mormons how much food they have stockpiled.
You are trying to base your argument on a biased and ignorant stereotype. In fact, my ultra knee-jerk uber-liberal uncle is also a dedicated gun owner, who used to hunt every year until he lost his legs to diabeties.