Unfortunately since you broke the tool, heat might be your only choice if it isn't epoxied in like mine was, mine had to be cut out. I also tried a 2-1/4 hitch ball, the 1-1/4 threads allowed it to thread into the paint saver, I then tightened the hitch ball nut to the paint saver to try and lock the threads on the paint savor, then try and turn the ball out with the paint savor on it, and I tried to heat the ball with a heat gun to transfer the heat into the paint savor, however this did not get it loose but it had a much stronger hold on it than the tool.
But as I've said before mine was epoxied in and had to be cut out, DO NOT try a hammer an chisel, I did and caved the top of the tank in. Good luck