Had to create this, when I bought a KitchenAid Food Grinder Attachment (FGA) that did not include the tamper/lockring tool.  It's based on one that I managed to borrow.  While kind of awkward to pack, it serves two functions - the more obvious is the wrench/lockring tool… But they shaped it so if you grasp through the lockring loop, you can use the handle as a tamper.  I'm not aware of this being available for purchase separately from the FGA.

For the food safety conscious, only the bottom/but of the handle would come in contact with food before it has been ground up.  If concerned, apply epoxy after printing.