- Edited
The round caps that go over the nut are stupidly expensive for what they are and available via Skandix but are listed on FCP , see the photo below.
I used VW Passatt , Golf , Polo , Jetta , you will need to put an O ring inside the cap before pushing it over the Nut but they work just fine and total cost was less than Aus$3.50 per wiper.
The O ring was just from a multi size pack in a plastic box.
Just insert O ring in the inner section and it will hold nicely
That's US$23.16 each plus postage , that's Aus$36.72c each plus postage.