The game gripper, I have a very alpha I wrote with OpenSCAD that was sized for phones with the double-Scud battery cover but requires some tweaking to better align with the charger and headphone jacks; you can still grab it posted on Thingiverse. I had stopped playing with N64 games by that point so never refined it beyond a single working test print.
For those who had it, how was the game gripper, it looked pretty neat and I wanted one a bit.