Forged stroker pistons - recommendations?

I've used Ross, SRP, Diamond, and Icon. With the right bore clearance they are all quiet. They als all have short skirts to clear the crank counterweights and all over time and use will leave marks on the cylinder wall - especially the lower 3rd of the bore and on the major thrust side. That's where the skirts are during the hardest "push". I'd suggest you verify the bores are perfect (via measuring), have the block sonic tested to determine the strength of the walls, and then determine if new pistons can be used or not. That will depend on the existing bores and the recommended wal clearance of the different manufacturers. You may find there are no usable pistons for the wear without going bigger.