Like the feel of the Joycon grip but don't want to be able to keep the Joycons attached to the console? If so this is the 3d print for you. It has a similar feel to the Joycon grip but is able to be put in between the Switch and the Joycon, giving you a comfortable grip while staying on the move.

I believe this is able to be printed support free but I'm not able to test it with my slicer so I can't say for sure.

NOTE: The Joycon side of the grip may require sanding as the "fingers" that create the slot are quite thin and may not print correctly.