What about having your current shoes arced to fit your current drums? Here they do for $5 per corner/fast turnaround/good finish on the shoes. It dont seem like they take off hardly any material but I've checked before/after & way more contact area afterwards & I was surprised how little contact there was before in supposedly "concentric" drums/linings. EDIT even new stuff will be slightly out of round & have a point where there is contact at that 1 point as tthe wheel/drum rotates & even if the drum is perfect the rest of the shoe assy ain't & will have that 1 place that will make contact first