Hi, Steve - when I had my exotic car repair business, I serviced many ALFAs. Just about all my parts came from International Auto Parts in Charlottesville, VA.
I have been dealing with them as long as they've been in business and never had a problem. They have good technical support and also build and sponsor race cars. Try them at <international-auto.com>
There is also a company called Centerline but I haven't dealt with them for over 20 years.
I've built many 1600 ALFA engines but I've never done anything with ECUs - all of mine including my present 1967 GTV are Webber equipped.
Also, there is a very good ALFA web site, <http://www.alfabb.com>, that features some interesting technical chat.
Hi, Dennis - Thanks for the compliments. I hope to test fly it soon but it's been bitter cold here - in the mid 40s for the last week.
Bob Z.