Eric,
Here are some additonal photos to help with the reassembly. The first is the wiper assembly fully together. Some of the others show the drive arm not hooked up to the motor to make the conections easier to see, and some closeups of the connections. The finishes are all the correct to the original with the minor exception of the attachment rivets on the bushing housings on the bar ends which I painted black for expedience. The original assembly is a mixure of black paint, gold zinc (or cad) and metal bluing/blackening. The rubber caps fit over the conical washers at the top of the joints. I've not found another source for these, but I suggest contacting one of the Alfa parts sellers like Highwood Alfa or Classic Alfa in the UK, although it is possible that one of the US suppliers will have them.
*Important! When installing the wiper assembly, first remove the wiper motor from the assembly. Put that in place in the cowl, and then insert the rest of the assembly into place and attach the motor. If you attempt to install it in one piece, you will at a minimum scrape up the paint on the wiper assembly and on the paint inside the cowl!
Hope this is helpful.
Chuck