Top Sash Guide - Compatible Parts?

I need to replace a broken top sash guide on my window. I am about 95% certain that I am looking for the SeasonAll 5/8ths top sash guide. But those are currently out of stock. I have placed a backorder request, but I am wondering if there are any similar parts that would be compatible if both sides of the window were replaced?I have attached a few pics of the part in questiona s well as a picture of the inside of the window.