Abrasives holder for Worksharp Precision Adjust Pro

The Worksharp Precision Adjust Professional model doesn't come with any kind of carrying case, nobody seems to sell one and the box containing the accessories is too big to lug around. 

This simple insert holds all 7 of the abrasive stones, and can fit into a variety of cases. 

• No support required
• Any filament will work (printed it in red TPU)
• outer dimensions are  145x166mm
• height with abrasive bars stowed is under 31mm
• note that the abrasives are slightly loose

I'm using a modified Husky (Home Depot) polycarbonate case, which is OK for the abrasives, the digital angle meter, the plastic support and the large knife clamp. Unfortunately, this case isn't deep enough for the small knife fixture, so I need to keep looking for a better case.  In the meantime, I store the small knife fixture on the unit and keep the large knife clamp in the case.