I found a website called shredderparts.com that sells replacement parts for Fellowes paper shredders, including gears, switches, and spare parts for the cutting head. Unfortunately, I could not find a gear with the exact specifications you mentioned. However, they do have a 39 tooth second stage drive gear that is compatible with the Fellowes P-45C shredder. They also have a 41 tooth 7 tooth primary drive gear that might be compatible with your shredder. You can contact them at 1-800-634-9329 to check if they have the gear you need in stock.
I had this happen where I worked and I elected to fix it. You have to remove the screws in the base, and IIRC the ends. Then I used a knife to cut the laminate pouch and pull out the pieces with pliers. If you can turn it on without damaging the machine or zapping yourself, the heat will help. My boss ordered a replacement which turned up a few days later :>D
https://www.google.com/search?q=Fellowes+Venus+2+125+laminator+jammed
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