Here is a cool knife model I use as spy:
You can download it
Here.
I also have "The club" for my crowbar.
Download it
Here. if you like.
I've got a bunch of other models, sprites, maps, xhairs and all kinds of cool crap. When I get the chance and have the time, I'll post some more of it here sometime. It seems like the tfccustomization.uk site is down, I'm not sure if the blueyonder site is still up or not but if I find customizations I'll post some links.
Note:
To use these models you have to rename or remove your old ones
BEFORE you add these to your tfc/models folder.