Don't buy from a marine supplier as they are very expensive instead find a truck dealer or fuel injection pump firm.
Now there is a damned good tip.
Some years ago I owned a 750cc BMW motorcycle. I needed to buy a couple of rubber diaphragms for the carbs. The BMW ones were £15.00 each. Some one told me that Hillman Hunter carbs had the same ones. So, off I went and got 2 Hillman Hunter carb diaphragms for just £4.00! When I took them out of the box and compared them with the BMW ones I was replacing they were EXACTLY the same. They were made in the same factory but put in different boxes, one for BMW and one for the Hillman.
Also many parts on the Jaguar cars shared parts with the Austin 1800, but of course the Jag parts were many times more expensive.
So, has anyone else on Ribnet got any tips like Pete7?
Keith (perhaps another thread JK) Hart