the spacers would go on the big ring side but if you need to shift it 4mm to miss the chain-stay then that is too big a jump between the rings, was the original 32 tooth ring scalloped to match the big ring? I would look at how much the crank needs to shift and then consider whether a longer bb would still allow a reasonable chainline and front dérailleur adjustment. Option 2 and 3 would be a smaller big ring or look at new crank and bb options I prefer the outboard bearing type like the hollowtec 2 varieties.