I'm sorry, but I can't help you here. About the only thing you could do is find someone that recognizes it, and that's going to be very nearly impossible. If you have a home repair shop (Lowes, Home Depot, Hechinger, etc.) nearby, I suggest you take the old roller there and ask for help. Beyond that, all that I can suggest is to try and match pictures and measurements with what you can find on the web - Amazon has some and more are available from other sources.
Sorry, I can't be of more help.