OK..........so I put my gloves on and handled a few of my filter-covers.............Your correct........the covers are basically rotated 180 on the F2-3 models. Fits like a glove. The K covers will fit.............but I did notice that the fins are thinner and trimmed to different lengths. If you insist..........I have a spare F2 cover...........$20 shipped...........its decent with no chips...........may have a scratch or two in the paint..........sorry, no spare bolt.