rear drum brake

my rear wheel seems to have a little play in it, when my brake is depressed it seems to click and the brake almost locks up. i have to usually rock it back and thatll loosen the shoes in the drum. when or if i try and tighten the axle it will over tighten the wheel and wont spin freely. my...

I have got all the parts to re-build my rear drum brake except for the two spacers/shims that sit on the shaft of the operating cam. I have the felt gasket. Does anyone know where I can get the other parts or have any idea exactly what they are fitted for so I can come up with a suitable...