That's okay, I think I know just what you need. See our 15-192 pivot shoe. Does this seem familiar to you at all? Look it over and let me know what you think.
In my experience the 15-192 shoe should work perfectly fine with most of your existing hardware. That includes the springs and spring covers.
There are two issues you may run into, though, which I've become well acquainted with over the past year or so. The first is that the front face of the 15-192 has little bumps that sometimes make its operation a little tight in the window track. This doesn't happen in all windows, but often enough to note. You may need to cut or shave those bumps off if you want a smooth operation.
The second issue is the pivot bar. Now, the 15-192 is a genuine Certainteed brand part, so if your currently balance system is also from Certainteed then you have nothing to worry about.
However it's possible your balance was made by Simonton, instead. The Simonton balance was just about identical to the Certainteed except that it uses a different, incompatible pivot bar. If that's the case you're in then you will also need to re-use the center metal cam from your old pivot shoe. These just pop in and out so it's not hard to swap out.
