Base-fab (the spin-off of expo van) can source the sienna seats, they quoted me "about $1200 for a pair plus shipping depending on where you are" which I didnt think was all that bad considering what you get for that.
That said I was referencing the rear seats. I thought that was the only option for those since base-fab/expo van sells the Scheel-Mann for driver/passenger and the sienna for the rear. I am still interested to know if anyone has used them for driver/passenger as well