Has anyone ever seen a hand powered leaf shredder? I am interested in one for compost. I already have a compost pile and want to be able to shred up my kitchen/garden wasted so it breaks down even faster.

Last year I used an old grain mill to grind compost on a small scale for aerated compost tea, but this would soon prove impractical for a large scale. I also own a hand powered mower, but that does not do a complete shredding job. Any ideas out there? I've google searched with no useful results.