Thanks for posting. Take a look at our 84-005M. This looks very similar to your old roller, though it lacks the curved feature in the front. Frankly we haven't seen that before, and I can't be certain whether it would affect function. Take a look and see what you think.
Hm, let me pass this on to one of our experts here who is an authority on patio doors. He'll be able to offer a more definitive answer than I can. We'll get back to you as soon as we can.
Hopefully I can help! After extensive research, I was unable to track down your exact roller, and it doesn't seem like it's available any longer. Fortunately I do believe the 84-005M, or perhaps the 84-008M, should work just as well. I also might want to add that you might need to replace only the two bottom wheels. Normally the top wheels do not get as much wear. Let me know what you think.
