So I made one

It's a pretty simple rig

In the first image is just the materials I planned to use
a 4 foot length of fairly stiff ribbed plastic tubbing (I wanted to use Metal Romex for it's poseabilitly but I couldn't find any) some scrap leather and 8 stud screws

after a night if me bending the tubling straight enough, while leaving a nice bouncy curl at the end. I used the midle from a CD spindel to put a tapered end on the tail. Then I used the screw studs to fasten one piece of scrap leather to the end of the tubing. Using a a wood screw as an awl I made holes threw both peices of leather along the top and bottom edges. I then double stitched it with two lengths of 50 lbs test fishing line (the same stuff I mage the whiskers with) I left the sides open so I could slip it onto a belt.

The last image is just me testing it out. It works great, hangs nice and there is a nice bounce to it (my cats were realy entertained)

It should work great most of it will be under the grim squeakers robes but it should look great.

I hope to be painting it and the skull tomarrow