I have a Fractal Design R4 case that I would like to add a glass side panel to. I did it to my R5 with an upgrade panel and love it. I now can't seem to find one. Does anyone here know where to look? I'm sure it will have to be used, since I can't find any new. Checked ebay etc, but no luck. I'm hoping that some knowledgeable person on here would give me some direction. Thanks.