To add to the above, don't know the diameter of your roller but the clips Watermom was talking about were cut from 1.5" pipe, as she said, about an inch wide. Then cut out a small section, maybe 30 degrees of angle. That will spring over a 1.5" diameter pipe. PVC can bend a lot so it's like a spring clip. Use a pipe diameter to match your roller diameter. If you need to stretch it some, PVC softens in boiling water so you can open it up and let it cool.
Al