Need to identify and replace lower window sash pivot shoes

This window is an Alliance window installed circa 2004. Original contractor has shut his doors so I do not have specific information. There are no tags on the window to identify series, model or serial numbers. You have a few pivot brackets that appear similar, but the dimensions are off. If you cannot match this pivot bar, what options do I have to replace the pivot bar with a new matching shoe?

The windows are double hung with the tilt in feature if that helps.

Thanks,

Chris