An old thread, but I just found a source for this power brick, so posting in case the info helps anyone else:
£20 delivered from UK eBay seller acadaptors_r_us
http://www.ebay.co.u...=STRK:MEBIDX:IT
Make sure you buy the UK Clover plug lead for the adaptor as well - the link above includes it (they have other listings which don't include this cable - i.e. just the power brick itself)
I just received mine, and am now really glad that I didn't throw my iGroove away after the PhiHong power brick packed up. Great sound for my iPod again !
Disclaimer: I am not connected to the seller in any way