If they can't help you then perhaps S&G Barrat can help- they have four outlets worldwide (Shropshire-UK, New Hapmshire-USA, Holland and France. They carry and remanufacture alot of stuff. http://www.sngbarratt.com/
Hope this helps.
1987 Jaguar Sovereign - Metallic Green
3.6L DOHC 24 Valve