Force sensitive objects are always fun and can make missions feel both exciting and rewarding when PC's get to the end and get a cool bit of loot, or even as a reward for following a side quest. However in the books there seems to be a real lack of force armour considering its abundance in the old EU. There are a couple of lightsabers, as well as lots of gear etc. but no armour so I was wondering what everyone would do if they were to create force relic armour for the game? The armour doesn't necessarily have to be exclusive for force sensitives although it should still have some ties to the force.

​N.B. I do not have Endless Vigil yet so I have no idea if there is such armour in there at the moment.

The only limit to these kinds of items is the imagination of the GM and the players. I personally don't feel that force imbued armor is a very Jedi like thing, but I'd be game for some ancient armor that a powerful Sith died in being stained by their dark side energies at the moment of death. The Jedi become one with the force when they die, generally speaking, the Sith don't, they tend to leave behind some corruption.

In my scenario I'd treat it like normal armor as far as the mechanics of combat go. I might have it grant the player some special abilities like one rank in lightsaber or a bonus if they used some dark side pips. However, that would mean some conflict granted for just wearing it. I'd also throw in something to the extent that if the PC wearing the armor suffers a critical wound or runs out of stress or something along those lines that the PC has a chance of being possessed by the force echo of the ancient sith lord should they fail a hard discipline check. The possession would only last a few turns but it could be interesting.

I'm of the thought that powerful abilities and items should have some potentially powerful side effects and consequences. I wouldn't necessarily tell the players what those side effects or consequences are up front but instead give them the idea that wearing/using it is a relatively bad idea, but still allow it if they really want to. Could lead to some cool roleplaying and storytelling either way.

Armor construction rules are in Keeping the Peace, the Guardian Source book. As for Imbuing it. That would fall under the Artisan's Imbue Item talent. The bonuses, however, are only temporary.