You can find tubes of various sizes at any home center. Take a body post with you to find a tube that will fit snugly over the post. You can buy as little as 1 foot or less, and this will last you nearly forever. Cut slices that will fit just under the body clip. When you mount the body, press it slightly to get the clip into place. This gives it a solid fit, eliminates body rattle and helps protect the paint.
Tip by Spencer Copley