I'm so sorry that the flying monkeys have found you too. They plague us here, but sometimes they do return the things they borrow. Don't bother moving. When they move in with you, they must put some kind of tracking device in your stuff so they can follow you wherever you go, even to work. I have found they are most likely to return your item if you just relax and stop looking for it. I hope you can work out a peaceable living arrangement with them.
Darren