I checked with Eureka, no longer available, checked with a few distributors, no generic bags available either. These fit the ancient 900 series models (rotomatic) Are there any substitutes a guy could use instead??
If you are near a metropolitan area, an older established shop is sure to be helpful. They do pop up on ebay from time to time. Your first thing to do is call as many individual shops as you can. The older the shop the better.
Do you have the cloth bag? I think you can use the machine with the cloth bag alone. With paper is best, but will work without.