Hi here is a list of products i used to complete this seat.

Dark grey Alcantara.
Black vinyl.
10mm scrim foam for centre backing.
6mm scrim foam for the vinyl.
silver grey bonded nylon thread size 20 for diamond stitch and top stitch.
black bonded nylon thread for sewing parts together size 36.
sewing machine LS2-B877-5.
spray glue sovereign contact adhesive.