Thanks guys
It did occur to me that given that the brake drums are the size of half/dollars, that super duper brake shoes are not really needed. Much like radiator shops and machine shops, I bet relining shops are far and few between although I'm sure vintage racers probably know where to go.
I had the rear disc conversion on my street/trackday 128 sedan and that was some major overkill!
Given that the wagon has power brakes, which seems rather silly for such a light car, I'll start with stock shoes on the back and nice performance pads on the front and see how that works.