I'm not 100% sure on that,
The actual pin itself looks smaller and from investigating my power connection on my old 7900GT the actual pins are square as well and smaller than the molex male.
so it might be a case of trying to fit a square peg in a round hole
If I do find some I'll buy a 100 of the darn things.
I know the molex ones ( male and female ) are easy to come by.
My main aim is to make a single PCI-E cable ( so i don't have to hide the extra )
Make a short SATA power cable with 2 connections
Make a molex with just a floppy and a single molex for my DVD rom and floppy drive.
shorten my 8 pin Aux power
and make a long molex for my fans with custom lengths between connections so it is easy to route