I found oneHERE But they do seem to be taking the **** with the price.
Partscenter are even more expensive @ £365.01 + vat and delivery.
You may be able to get one from HERE if it happens to be a giannoni type and you can match it up.
I wouldnt normally recommend a non manufacturers part but this is an exception. Don't expect the same quality but for the saving I say it is worth it.
The diaphragm is there as well if thats all you need.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local