That's the cast piston. It's acceptable to run as long as the tolerances are kept tight but when it goes, it's going to do what all cast pistons do... crumble.
I contacted them and they said they will have another batch run "when the economy improves" some.
The vito's forged pistons were made by wiseco and wiseco will make a minimum batch "for a fee". Ken contacted them about it but couldn't plunk down the capital without having a certain number of confirmed sells before hand.