I've seen a lot of posts about the syurofoam trunk inserts, and currently I'm not trying to make a replacement but I would like to make cut outs in the foam so I can store tools and emergency kits. Like slots or cutouts, and then lay the mats on top to cover them up. I would like to do this on a fresh set, so I can keep an unmolested set around for resale down the road, but I can't seem to find them online or anything. Anyone know where to buy these or what the part number is? Thanks