you can get a from www.gasbit.com, you can aslo contact them on 0845 257 4235, but they are not cheap as I was looking for a new heat exchanger for my Myson Apollo fanfare 30/50 boiler which would cost nearly £400, you would need to way up your costs as to whether the age of the boiler is worth this sort of value spending on it.
John
December 2007