Nvidia 9800GX2 & Dell PSU problem

My computer is a Dell XPS Gen5 which uses a 650W PSU.
I've recently gotten a Nvidia 9800GX2 graphics card but when I went to install it I realised that my PSU was lacking one connector as the card requires two (P6 and a P8)

Is there any way to get an extra connector from my PSU via some sort of adaptor?

Looking for other solutions I came across a dell to ATX power supply converter as my machine requires a Dell PSU but Dell do not make a suitable upgrade.
http://www.endpcnoise.com/cgi-bin/ [...] lconverter
If I were to get a non dell PSU would the converter work with my XPS Gen5 parts?

Due to case size restrictions if the convertor was viable I would be looking to use an external PSU such as ST-600EAZ from Seventeam. Although open to other suggestions.

Any advice is greatly appreciated,

Thanks


Ryan

I don't know anything about this "Gen5" but what specifications is the motherboard?? I think most of their higher end computers use P4-ATX,and therefore a good medium or large tower MIGHT work,but I'm not sure.