Hello!
Here is what I have found on the SJS Sports Cars website.
SJ618 - Foam Strip for luggage tray to engine cover. Cost 1.95L
A079K4001F - Foam strip stuck to bonnet. Seals between the spare wheel and the luggage compartments. Cost 3.78L
I was unable to copy the pictures to post here, but they are different colors of foam and possibly different densities as well.
The picture that I posted above of the boot lid looks like there is one piece of foam going straight across where the front of the tub would rest and there appears to be a second piece of foam wrapping around the rear, too. That makes sense because that second foam barrier would help to keep tailpipe exhausts from entering the storage tub from the rear.
Nonetheless, you can check out the foam pieces on the SJS web site here -
http://www.sjsportscars.co.uk/index.php?mod=9I hope that helps.
Bob