Speaker Cover Foam

[jcantor]

I'm in the process of cleaning the inside of my car after having the window tint removed - the shop did a very nice job of removing the tint but left gunk all over

One area that needs cleaning are the covers over the rear deck speakers. Having removed them, I've realized that the foam that is on the underside to keep dust out has dried out over the years and needs replacement. Any suggested sources for this stuff? Do I have to look for MB OEM foam or can I get "standard" speaker foam from an audio outlet (whatever "standard" is in this case )

Thanks
jlc