I'm looking at doing a case mod. I want to cut a custom hole in the side of my computer case. I don't want to use a window kit due to the indentions in the door. What I'm looking for is the rubber / plastic / ?? gasket type thing that I can place along the edge of the metal where I cut it. The plexi will mount behind it using tabs. What would I use in Google to search for this? I've tried a couple of different thing but can't seem to find it. I've also looked on some modding sites and I must just be missing it. Any help would be appreciated.