Mike's PCjr Page

What kind of foam is it?
Just got a case that does have the foam, but it's gone very brittle and crumbly.
I was curious if anyone could identify the exact foam used in this, I wanna restore it but do so as accurately as possible.
I'd hate to send this otherwise pristein case to the bin

Oops, file was too big last time

Was looking at a few eBay listings, and noticed something extra over the ports, not sure if these are extra parts of if these are moulded into the case. Seller claims it was once a POS machine if that helps