Klarius from ECP or CP4L when on big discount offers, up to 50% off at times.
They are fine, well made and in my experience longer lived than others excepting stainless. If collecting from ECP (easiest if you have one nearby) scrutinise the component parts to ensure you are not being palmed-off with damage stock or returns!!
Look at their online catalogue as 'our man' says above.
Bob
