I probably could have come up with something.
Dropped one on the floor, I found it, after about 10 min crawling around.
I have a large magnet for recovery of metal parts like that, but that would not have helped me with a brass bushing.
I want to get one for the shelf.
I hate to have a Heli left on the bench when I want to fly it because of some inexpensive- very, very small part like that.