double roller | hard to find part

Hello,

I don't recognize this roller right off the bat but we'd be happy to see if we could find this part for you. Could you confirm if this is from a patio glass door and if you happen to know the manufacturer? Also, the dimensions that you mentioned would be helpful, including the housing width and height, as well as the wheel diameter. Thank you!

Unfortunately, we could not find a roller like the one shown in your photos. Take a look at the tandem rollers we've related for you. These are a bit taller than the 7/8" height of your roller, but take a look to see if you can adapt one of these options to work for you. 

If your housing is still in good working order, though you would still need to replace the adjustment screws, you could consider the wheel and axle kits we've related for you as well. Maybe this could be another way to repair your door. The wheels that we carry have a 5/16 concave groove. I'm not sure if they are wide enough to work on your track but look over these options, along with the related information and videos. Thanks for posting.