I've seen some great discussion on the board and hope someone could me out with some sliding door rollers. I have a contemporary house built in 1972 with Allen Stevens doors and windows, and the rollers on a 8 foot wide (4' doors) door failed many years ago. They are clearly marked with "A-S NYC" and PN 6573. Obviously the original manufacturers are long gone.
The roller itself is 1 1/8", which narrows it down to around 9 rollers on your site. Any ideas on a replacement? The graph paper is 1/4" grid - the roller assembly is a little over 3/4" wide and a total length of just under 3", vertical height is around 1".
Thanks in advance.
![User submitted photos of a patio door roller.](/images/pictures/2016/06/71733.jpg)