I thought I had an extra in my slowly accumulating Super parts pile, but I did not. It should be a lower case script with 3 pins. Highwood Alfa (UK) may have it, but I seem to recall they had a 2-pin configuration
You could try:
http://stores.ebay.com/Alfa-Barn
on Ebay. They do come up from time to time.
You could try:
http://stores.ebay.com/Alfa-Barn
on Ebay. They do come up from time to time.