Please help me identify patio door roller

Your roller is similar to our 81-250, however our tab isn't horizontal, like yours. I don't think yours was horizontal originally, either. It looks like someone physically bent the tab back to install it, which makes me think this isn't the part that came with your door originally.

I admit, I've bent a tab or two in my day. It's a reasonable fix if nothing better is on hand. However, you may have to end up doing the same since we don't know what your original roller was.

Start with the 81-250. Carefully compare our dimensions to yours and let me know if they all line up. Then, decide if you'll be able to bend the tab back the same way yours was.