I was looking for a short pencil at a local paper store but was unable to find something that worked for me. 

Saw the Schneider 708 M refill  which was short so I decided to 3D print a shell for it. 

There are replica refills that are cheaper and can be used also. 

Assembly is very easy. Put the refill inside and screw in the bottom. 

I used brim to ensure that print is successful everytime.