A picture of the suspension with the upper A arm removed
Upper A arm with bushings. I sliced off the frayed rubber ends and was able to use a bench vise and various sockets to press the upper bushings out. Clamped down with the vise, used some PB Blaster, and a few taps on the side of the arm with a hammer and the bushings worked loose.
Lower A arm and the problem posed by the mounting pin extending out past the bushings. My vise can't span the length of the pin. So, I went to my Fiat mechanic to see if he can press the bushings for me. His response was he buys the entire arm (faster, easier, and cheaper for his customers) and told me to check with a machine shop.
I removed the other side. Once my parts arrive, I'll see if I can install the upper bushings. I will take the lowers to a machine shop. I used that pipe nipple trick (mentioned in a different suspension thread), to further compress the spring. This eliminated the need to use a "floor jack under the lower arm" method.