The shock stick from content warning by landfall.
It is designed to use a ¾" wooden dowel, but if you really want to print it go for it. The stick in the files is 3ft long, which looks about right, but make it as long as you want.
Please show me your makes, Ill be sure to post my own as soon as I get a dowel to put it on.
The author marked this model as their own original creation.