One thing that has worked for mee in the past is to replace the "gummy" rubber with black adhesive lined heatshrink tubing. Measure the old roller diameter, remove old rubber down to metal part, carefuly shrink on a piece of new heatshrink. Oversize heatshring builds up thickness quickely, sizes close to the diameter do so more slowly. With *care* it can be turned to the correct diameter although not by much, you need to be close to finished size. I used adhesive lined for the first layer on the metal core, susequent layers stick to each other quite well. Mike