Most bushings that are in a blind hole such as an end cap can usually be removed by finding a tap that the O.D. is a little larger than the inside diameter of the bushing and yet not as large as the outside diameter of the bushing. When you find this tap, just start threading into the bushing and when it reaches the bottom of the hole, it will start pushing the bushing out. By the time it is about halfway out, you will be able to pull it out with your fingers. All this sounds more complicated than it really is. Good luck.