Higher compression pistons for a 400?

Does anyone know where I can find some good pistons for a 400, +.030 that has a higher compression than the factory, something in the 9-1 range that is fairly economically priced? MP used to make them, but not anymore, and I can't find them anywhere.

I don't need anything fancy, lighter weight would be nice but not necessary. I'm just looking for a little more compression to be in the range that is called for with my cam.

Any help would be appreciated.
Author: 400Magnum