These are right wing organizations, but as far as I know, they focus mainly on domestic issues. But they are still worth a try.
True.
However, people from JTF shouldn't just start contacting random people from those forums. First, you would need to observe the content of some of their posts to get a sense of whether or not they would be interested in supporting the growth of JTF.
For example, there are some conservatives who believe Jonathan Pollard's sentence is justified. Some have stated that they think he's lucky to not have been given capital punishment. However, they probably don't know the facts. By making ignorant judgments without knowing facts, their bashing of Pollard is actually a tactic used by liberals.
To describe the Pollard haters, someone described them like this:
"I didn't jump into this thread because you were just asking a few questions. I jumped into this thread because you were giving analysis on an issue you don't know enough about to even have an opinion."
So the Pollard haters adopted the tactics of liberals. Rather than debate with facts, they were clearly defaming.
I found a couple of Pollard supporters at the FreeRepublic forum. They are people who I think would be supportive of JTF, assuming they already don't know about it.