As from 6th August 2012, Sten Lights will be back in stock at;
www.excellentstuff.co.uk
Price will be £325 and will include everything you need such as the battery, new waterproof battery housing thingy, charger and the Sten itself.
Power output has been increased and I understand it will be almost twice as bright as the one I currently us (don't mock me if I am wrong because I don't understand how lumens work).
I know there are many less expensive lamps on the market that are decent (and there are) but for me, I love the strength of the Sten and it's ability not to "spot".
Ian