BUSHINGS? Try your local lawnmower shop! I have used Snapper rider nylon tie rod bushings for shift and clutch linkages and 30-06 and 9mm cases for peening into a hole to resize it. Bronze or brass hinge pin bushings can be used many other places, too. I even found a bronze bushing with about 5/16ths ID at Ace Hardware!
Let your imagination run!
Best wishes,
Les