Goodwood

If you are looking for the engine bay cover, then you can order a pre-cut mat from NKG (it is not listed on their website but is available if you contact them):

https://www.nkgroup.co.uk/product-category/vehicles/

It is a rubberized material and will not break up.

If you are looking for the soundproofing for inside the engine bay, this is no longer available and you will need to make it yourself. NKG mentioned above sells an adhesive soundproofing material with foil that could be cut to fit (different material than the engine cover mentioned above).