If you're looking for an easier way of getting the expedition armor you can use a mod mathulus created here: http://www.strategyc...ex.php?dlid=529
If you rather not add this mod but try to get the armor with the vanilla trade files then you'll need the following:
To get Martian EMP grenades from trade you'll need:
- 1 CrossBow BuzzSaw
- 2 CrossBow Saw Discs
- To be allied with the martians (just at peace won't cut it)
Because trade is somewhat random, you might not get this trade offer the first time around.
Giving them territories via savegame editing won't make them change their trade habits, this seems solely dependant on current relation with the player's faction. But if you still like to go for that, I believe something was attemted in another thread some time ago.