What, don't you remember how to get to the weapons cache? I must have run across it in my first few hours of play. It's right behind that asteroid base in the same system as--whoops, almost spoiled it for you.
A bit more seriously, though, I recall someone wondering what had happened (in Righteous Fire) to that Exploratory Services chick that doesn't try to screw you over (for once) in Privateer. A quick look through the dialogue file revealed that she had been replaced by Vincent, or some thug like that. So no, she definitely doesn't exist in Righteous Fire, if anyone was wondering.