Custom pitstons - brand recommendations?

[Sondrusen]

My 560 high compression engine, is going to get low compression pistons, I'm planning to put a supercharger on it during it's rebuild, and I will need customs pistons for that. I have now idea what to choose from, so any help will be much appreciated, I know I need low lower compression, and lower numbers for the amount of boost. I'm planning to get around 500hp max at the wheels.
Do you guys think I need rods as well? Rods are hard to come by to the m117 :/ The build will be done by a shop, but I need to get all parts needed for the engine first.