Hi woodelf, hope you are well :)
I bought mine online and went straight to the silver type ones (Mine are eGo-T's), instead of the ones that look like a fake cigarette as they are better value for money, are easier to replace bits for (as well as cheaper) and give far more oomph.
They are now creeping into shops, ive noticed by local newsagents even selling them now, and there's even a independant specialist shop opening local to me as well.
There is a chain of shops called Liberty Flights, may be one near you? I've popped in many a time, and they offer great advice, will talk you through them and even let you try out flavours before you buy them.
I've been on my ECig since last April, so well over a year now, and despite the odd craving (usually when out and drunk!) ive not suffered too badly.
If you want to read further I highly recommend this site, friendly people, who once again will offer fantastic advice.
http://allaboute-cigarettes.proboards.com/
Good luck