Kelly kettle customer service is very good. I bought two from Anchor Surplus - surplus equipment from the Camel Trophy, so they had been half way round the world and it showed! I needed new corks/chains and they were supplied very quickly at trivial cost.
The Kelly Kettle is not suited to backpacking (bulky, heavy, collects soot) but brilliant for fishing, car camping, canoe trips, group camps, etc. It is astonishing how quickly it comes to the boil. If you need to purify large volumes of water by boiling it really comes into it's own.