Ask the nearest Alfa dealer, but not sure its a part avaiable alone. Look at this pic. FIAT ePER
If you are in an arear where new Alfas are marketed try finding it at a scarb yard (some gets written off in accidents).
Erik's suggestion is right on, actually. If the nearest dealer is in England or somewhere so be it. You just need an Alfa dealership or parts stockist for late model parts. Why would somebody in the US have that part? I'm sure there are some test mules or something n this country but I would guess the number of cars potentially needing that as a spare part is less than a dozen. Just figure out what car that would have been on and contact an Alfa dealership somewhere in Europe and have them ship it to you!