Hi Rodford,
Exact reproductions of the plenum bulkhead sound proofing is possible and long been considered.
However the limitation is simple economics.
The majority of our trade is into Europe which involves ridiculously expensive freight charges from the penal colonies.
The freight charges are prohibitive and will make the component too expensive for what people want to pay.
It is possible to economically repair the damaged Ford sound proofing using Sikaflex adhesive and painting in satin paint.