Where can I buy a specific laptop battery?

I have imported a HP DV5T from the US and it shipped with a 6 cell battery. I am looking to buy a 12 cell battery (or at very least a high capacity 6 cell battery) but can only seem to find the same 6 cell battery that is shipping with the unit.

Does anyone have any idea where I can get one? I have lookedo n ebay, HP.com and google but to no avail, just the 47WH ones.

Cheers

Google PSA Parts mate

Superb, thanks mate

I've always found PSA to be really expensive, even with trade discount. Try www.RETUK.com

Cheers mate, neither site seems to have a HP Pavillion DV5T-1000 at the moment so I might have to import.