Gears for Canon iR3225 paper tray

I use a Canon iR3225 photo copier / printer / fax etc... but the gears on the paper tray broke, they were really poorly made. The gears adjusted the guides for the paper so you can use different sized paper, when you moved one guide, the gears would move the other guide, so that the paper is centered as it goes in the machine.

Repair man wanted several hundred dollars because he couldn't replace the part, he would have to replace the whole tray, and he had a long way to drive. He said tha