trueburton

As some of you may know i am getting rid of my comfortable stock seats. well i am replacing them with a pair of hardly used racing seats by Matrix motorsports. I got them for a great price, too bad they are intended for imports but they look good in my car. The only problem is that i am missing the plastic insert peices where the harness comes through the seat. Now all there is are two holes in each seat that look terrible and cheap. Any one know where i could get a two sets of those inserts? I have emailed Matrix but they keep telling me they will look into it and i never hear back from them. Will any brand inserts work? Are those openings a universal size or different by brand? Any help would be great thanks.