Please don't take this the wrong way, but I think you need to give us a bit more information about you, your car and your particular problem, because what you've posted is a tiny bit confusing.
Unless you're a transplanted Brit/Euro type working in the U.S. (or conversely a Yank who is working overseas) I sort of doubt your previous car was a Bora since that model name never made it to the U.S./Canadian shores. Of course if you're an American ex-pat, then I don't understand why you'd list your location as part of the lower 48.
I also don't know what year a '52 registered car is (anybody care to translate that for us non-UK residents
because we certainly don't use that dating format here) but no matter what year it is, I highly suspect you got it from a dealer -- at least not as we understand the term "dealer." You may have bought it from a used car lot or an Alfa specialist, but not a dealer, since there are no such creatures left in Canada or the U.S. and as such, there is no way you could return the car to your dealer.
Now I only know of one or two Americans who managed to legally get their hands on a 156, and those were the very earliest of models. I've heard that there are a few diplomats who were allowed to import their personal cars for use while posted overseas, but I can't imagine what a diplomat is doing in Arizona -- unless there is a small consulate there, and I admit that could well be the case. I guess other foreign nationals who are in the U.S. on a work permit and who willing to undergo the paperwork could be permitted to import their cars, but that's a pretty costly and time consuming route.
Sorry to sound so suspicious, and not to be able to offer you any answers to your problem, but your posts really caused a lot of questions to go off in my head.