I want to replace some component material in a macbook pro. It's described in ifixit tutorials as "EMI foam," but I am not sure whether it might also be known under other names. There are two or three pieces of this stuff, all under 10 mm in size. I am not necessarily looking for Apple-branded material, if a generic supply will work. And if it's possible to buy a lower-priced roll or larger section that I can then cut to size, that would be preferable to paying $20+ for each individual piece already cut to size. Anyone know where to find this stuff (can you suggest website names, for example, or which sorts of local shops might carry it)?