Glad you’re still having fun. What you need is a buddy with a working starter on his Leopard. Take the entire starter and bendix off of his engine and put it on yours. That’s only six screws.
If you plan to continue racing a Leopard, purchase another starter assembly. That’s a starter motor, bendix and supports brackets. At that point, swapping out a starter is quick work. Have done one on the starting grid before the green flag fell.
Have you ever moved your ground wire to the screw that runs into the starter motor? Figure #23 in the manual.