I spoke earlier today (Tuesday) on the phone with Steve Rakoczy. I had problems with being able to forward photos to him via email. Please forward this message and the accompanying photos to him so that we can continue working on this together.
Steve-
Here are some pictures of the Alliance sliding closet door roller hardware. As best as I can tell, the diameter of the roller is 7/8, and the offset is anywhere from 1/2 to 5/8... maybe call it 9/16. A major design flaw with these is that the adjustment screw is made of plastic, and over time it gets chewed up by a screwdriver. I would be happy to find something that was similar to these, but had a different mechanism for adjustment.
Thanks,
Brian