Can I get hold of replacement cog?

Hello,
I have a Aurora AS650C paper shredder, which has stopped working. The motor still runs, so I took shredder apart and found that the first plastic wheel cog, which takes the power from the motor has perished. I would like to know if i could perchase a replacement cog, so that I can get the shredder working again.

Mark Cadogan
August 2012