I ordered myself a Logitech Cordless Vantage off Ebay for £30 brand new today, I read all the reviews and it seems to tick the boxes for all the things a headset needs.
Has great sound quality.
Has better battery life then the official one (12 hours).
Automatically pairs to PS3 every time.
Has a mute button.
And knowing Logitech, they have BRILLIANT customer service and their products are built brilliantly.
I don't really want to go to extreme lengths to get a Official one, or import it, so this seems like a good alternative option. And from what I have heard, anything is better then the Giotek one