I have the Sullivan Aluminum Ball Connector w/Sleeve 4-40 Blue as shown here.


I need to find a source for the balls only because I don't want to buy a whole unit to replace a broken ball. I don't need the body, nuts, washers etc, just the ball.
In case it helps, the ball diameter is .152 inches. and it has a 4-40 thread.

Thanks for any help.