Window Shoe

Hello. I'm trying to find a replacement show for an unknown window manufacturer. It looks like the picture above. Additionally, I'm wanting these because the window won't stay open. I've checked that the shoes rotate and the window locks into them both. They're just not holding the weight. Would replacing them fix the problem? I'm a DYIer an not a window expert by any means so any help would be appreciated. Thank you.

Hello again. So after looking a bit further I learned that I do need the shoes. You can see from the pictures I added that the hook that attaches to the balance became worn and broke off. If you have these that would be awesome. Additionally, if you can somehow identify a potential window manufacturer, that might be helpful in the future. Thanks again.