I have heard of lots of cases of LC1's conking out, as do emerald, so I use Tech Edge as he suggested.
I got mine from trigger-wheels.co.uk, it is a 2J1 controller, with some very good features like calibrate, good for new sensors, just a button press away(in free air), and you can test sensor as you can any with a lighter(butane).
He also sells on ebay, it was £136.99 delivered, uses the latest Bosch 5 wire LS4/4.2 lambda included in the price, and is the uk seller of these, also got my 36-1 trigger wheel from him.