Material on Rear Package Shelf

["Scot Stern" <SGSKBM@xxxx>]

I tried this question about six months ago and got no answer so 
perhaps now someone is in a better position to answer. Here goes:

My car has 9,500 miles on it and is totaly original. The rear 
package shelf has a material on it, under the carpeting that "cracks" 
every time I touch it! I would like to replace it but I do not know 
what it is. Does anyone have any advise or is the part available 
from any of the Delorean houses?

Thanks,

Scot
6452