twenty-nine components are shown in this Xp500a 2007 15b2 Finland 1f15b-300ek Seat exploded diagram.
A sample from the products for the Seat include: Nut,flange(j10), Seat Cover Assy, Seal, Lid 1.
The component with the lowest price in the SEAT schematic is the Bolt, Flange(jf2).