PGT (?) Sliding Door Rollers

I do recognize this roller, as a matter of fact. The bad news is that it's discontinued and no longer made. An alternative was in use for a while, but then that part itself was also discontinued. 

Right now we have no confirmed alternative, unfortunately. Of all the parts we sell I would say that the closest still available is our 81-057, though it's obviously not exact and I cannot be sure if it will work well on your door.

I'm sorry for the inconvenience. We've wrestled with this one for a while with no luck.