Old Pella Casement window hardware

I have a couple of old windows in my house that are in great shape, but the handles are a little worn. They're probably from the late 1940s or early 1950s. I have two types of windows: those that fit a 3/8 spindle and others with larger handles. Finding replacements has been difficult. Do you have any suggestions for what could replace these? I also have Pella x429 handles, but they don't fit these windows since they are too small. Everyone has suggested those. I would appreciate any suggestions to help me open all the windows in my house.

Here's photos of the handle and the hardware [https://imgur.com/a/vFnQwVU]