A free standing tool rack to hold some common printer tools.

There is a place for hex keys, pliers, and number of holes that can hold any number of tools. 

On the underside of the part that holds the hex keys there is a square slot that is meant to fit a M3 square nut. The hole on the side fits a M3 screw to thread into the nut. You can then use the screw as a hanger (I'm hanging the scraper from the screw in the photos). If you have some spare hardware for your Prusa you should be able to use it for this.

This is a fairly simple one to print if you flip it upside down. There is one section of bridging but I was able to print without supports pretty easily.