Hi there is there anyone selling these chips in the UK?

You could looked here in the pinned topic,

http://forums.xbox-scene.com/index.php?showtopic=180183

And this don't sell Smartxx but it's a good site,

http://www.kanection.co.uk

I'm about to buy a X360 USB HDD Adapter from them, but don't buy from MrModChips I have heard really bad service with them (not getting product etc etc).

And look in this forum to view/post about web shop ratings.

http://forums.xbox-scene.com/index.php?showforum=37