Hi I have an I-cute case, it is black with a window in its side. Im going with a neon blue theme,, and already have 3 blue led cooling fans, one intake, two exhaust. The intake fan is located in the plasic window, I want another intake fan in there too, the problem is, i tend to mess things up first time round, does anyone know where i can get a replacement window from (a clear piece of perspex or whatever), i like in UK, so a shop which is accessible for me. What would be the best way to cut the 80mm or 120mm diameter holes? Thanks. p.s. are 120mm fans much quieter than 80mm ones?