Didnt I see something about lack of Vitos big bore pistons?

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.