Brake shoe sizer and centering tool
This tool can be set to the radius of the drum and then used to check the shoes on the wheel and center them too. The $99 this guy is asking is too much money for it but it is a solution.
The best tool for the A is the Barret Brake Doktor. This attaches to the axle and sands the shoes to size on the car. This means the shoes will also be centered to the axle.