Technical Fuel Pressure regulator membrame

[SpaceBird]

Hi all, Last week I had to replace the fuel pressure membrame in the SPI unit because fuel was pissing out when idling....(Tipo 1.4ie dig. cat)
Anybody have any idea where to buy this part? Partnumber? Company? and probable it is also mounted in other car brands / model but which?
Thank in advance for the help.
Spacebird

 

[purf]

Same as the one fitted to my 93 fiat tempra 1.6 ie engine
I believe lancia dedra is the same too

 

[purf]

You could try rgrally on Ebay?