Power Supply accessories

[jbweldon04]

So, I got a Ultra V series 500w power supply for free from FRY's, but I have a p180 Case. I don't want to buy a freakin 80 dollar power supply for this case, so I want to buy extensions. I don't know exactly which extensions to buy that will fit. My system's hardware is:
Gigabyte DQ6 motherboard
Ultra V Series power supply
P180 Case
BFG 9750GT graphics card

I just want to know exactly what accessories to buy, that is all.
Thanks for looking at this thread. This is one of the best forums I've ever been to for computer help.