I'm afraid there arent many shops to my knowledge in UK that would be able to sell you this bottling (others please feel free to correct me in this should you know a source). Even the famed whisky exchange doesn't seem to have any at this moment, although they do have the 1978 Ardbeg for £ 150 a bottle. Milroys of Soho had none as I checked just before Christmas.
I did find one place online where the whisky is being sold at, for £150 inclusive of VAT a bottle:
Another, more expensive :
I haven´t personally shopped with either of these, but have no reason to doubt their honesty.
If you have no luck, drop me a line, maybe I can help you!