replacement patio door roller assembly

I'm not certain if we have a match for this roller, but I'm checking with one of my senior colleagues, and we'll get back to you as soon as we can. Many thanks. 

Thanks for waiting while we looked into this. Please take a look at the 81-133 roller, used on Alcan patio doors. Your roller kind of reminds me of this one and I think it's a good place to start. Take a look at the dimensions and pictures we show on its store page and see what you think.