As a Wiseco WD, we get advanced info on products for the coming year. Looking over this info, I discovered that they will be making pistons for Honda CB350s, CB360s, CB450s, CB500s and CB550s. They show CRs of 10:1, but not sizes. Don't know if big bores will be included.
File says "available spring 2012". I will try to get more info.