In the US, Fisheries Supply in Seattle (on-line catalog at http://www.fisheriessupply.com/
carries several brands of wiper arms, blades, etc, including AFI and Vetus. West Marine also carries some brands of pantograph wiper arms including AFI. We put an AFI all-stainless pantograph arm on the center windshield section of our boat and have been very happy with it. The Vetus arms might be better made but they're also a lot more expensive.