It sounds like you are hoping for a small decorative push dagger neck knife. I don't know of such a thing, but you could always buy a small necker and modify it to look more arty. Size, weight and imagination are the limiting factors. A non push dagger you might look at for that purpose is the Outdoor Edge LE Duck.
Basically you are looking at a custom build, but you can use a production knife as the foundation. Any ideas on how big and heavy you can go, and what looks/materials would appeal to you? Any favorite plants or animals it would be cool if it could be disguised to look like?
Or a big flat egg-shaped pendant with designs on it - that would be a good way to hide a mini pal after removing the existing sheath and handle (the top 2 dots are retention magnets). Can be made of g10 or carbon fiber or really pretty wood, etc etc. However the handle will need to be pretty thin or it will get bulky and less like jewelry.
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