wrote:
I have rollers on the bottom of my sliding windows that need replacing.
They're aluminum framed windows, original on a house built in the late
70's. There is no brand identification of any kind that I can find. I
have no idea where to find this part.

Here's a picture of the part I need. The penny is for size comparison:

http://www.yourfilehost.com/media.ph...e=IMG_2630.JPG

Here is one place to check:

http://www.swisco.com/page/SI/CTGY/s...rollers-guides