1. DFK classic rendition, I have a couple ideas but no loveless. I'm thinkin Scottish Dirk, or Puñale Criollo. You know, ethnic classics. Maybe a Daga style Criollo.
2. Distally tapered strong machete or short cutlass, double-single guard in the Wild Bill style.
3. DFK radical kamisori (I can help you with the geometry)
4. Push dagger, asymmetric grip, one finger over and two under.
5. Office friendly TI box knife. Fixed blade with a pocket clip.
-X