This from Base-Fab:
Unfortunately we don't manufacturer any seat adapter kits to put the Sienna leather (footrest) recliners in the front of the Savana's or Express', only the Ford E-Series.
You can definitely put the recliners in the 2nd row.
For front seats for the Savana/Express, all we have to offer are the German scheel-mann seats. Some info from our upcoming website update;
That is a pricey option!
'07 GMC 2500 6.0