Which cables are needed for a SATA HDD (Modular Power Supply)?

[Blobbin]

I am trying to fit a new HDD to my PC. My power supply (EVGA SuperNova G2 750W '80 Plus Gold' Modular Power Supply) has only 6 pin PCI express connectors, and my HDD is a 15 pin SATA cable.

I need approx. 12" of cable to complete this, however I am finding it very difficult to source the corresponding cables to make this possible.

Have you any suggestions as to how this can be achieved?

 

[Blobbin]

Thanks for the reply.

Do you have an example of the cable that would be used to power a HDD? I've had a look at the kits that you were mentioning, and I still can't seem to get my head around how any of those will power the HDD. In the past, I would just use a cable like the one in the picture below, but I can't seem to find a cable to then fit into this and then into my power supply. This is my first time using modular.