2010 Lonestar/Prostar front curtains

[Waterloo]

They are little chrome caps. My international dealer has a drawer full of them in parts. You can probably find them at any hardware, Lowe’s or HD. They look like these, but smaller. https://bmxmuseum.com/forsale/29543

You should have the same caps on the window curtains if you have those. Right over your left shoulder when sitting in the driver seat. Turn head, look up.