I didn't find a KiCad version, but I found Eagle version here http://www.diymodules.org/eagle-show-object?type=usr&id=2259&file=con-molex-micro-fit-3_0.lbr&package=43650-0500. Eagle libraries can be loaded directly by KiCad, but the silkscreen outline appears to be missing.
I converted the Eagle library to native Kicad, which produced a better result. This is an automated conversion, so may contain errors. It also retains some quirks of Eagle, so pins are numbered P$1 etc. You can renumber them or use the included symbols.
con-molex-micro-fit-3_0.zip (238.7 KB)