Couldn't you make your own cables? This thread (RGBpx wiring Diagram
) at AC might help. It has links in it to the correct Molex parts (1.25mm Pitch PicoBlade Wire-to-Wire and Wire-to-Board Housing, Female, 4 Circuits) you would need, as well as pre-built cables that might work.
Also, if you're going to go diy and make your own, the hand crimp tool
for 1.25mm Pitch PicoBlade Female Crimp Terminals, 26-32 AWG looks like the correct one to use. Like other Molex crimp tools, it is expensive though (~$350 or so, give or take)
Not sure how well other crimp tools might work.