Roger,
An alternator is one of the easiest things to replace or repair.
First, you can always take what you have (since it came off, it should go back on easily) to any auto electric shop. They'll rebuild it quickly. I don't specifically know what's in your neighborhood, but surely there are a few.
If you want an exchange, usually non-branded, you can go to nearly any foreign auto parts store or even a Pep Boys or similar, and if they don't have it they'll get it quickly.
Third, order a Bosch factory remanufactured. Autohaus AZ has them for ~$75.00, and you'll have to send back the core. With the shipping, and since you have it out, you might just find a Bosch parts store in your neighborhood to order a Bosch reman for you.
Lastly of course, you can always get one from the Classic Center, or any dealer.
This was listed not in order of importance, but perhaps in ease or cost...lowest $ to highest $$$...