They refused to do it. Claiming they don't know when the parts will be available and that they don't want to drag this out.Just under $400 per seat, so $800 total plus labor for install as shown in the thread below (the couple thousand dollar threads were probably about putting a spare tire into a van delivered with just the inflator kit). I still don't understand why the OP isn't just asking them to place the parts order and to do the install once parts eventually come off back order, though.
Go to this site and click on "View More Images" to access several exploded diagrams of the second row seats including ottomans. REAR SEAT & SEAT TRACK. 2021 Toyota Sienna | Toyotawww.siennachat.com