This thermaltake 200mm aftermarket top fan i bought does not come with the long screws needed to fit. Not only that but there are none of the 4 long screw fans that came with the coolermaster CM 690 iii case either. Also , there are no threads in the 4 mounting points of the case to attach the 200mm fan ! I'm imagining i need a clip with a thread in it that snaps over the hole . Anybody know where i buy these clips a fan screws ?