schlem suggested using a hex-to-1/4" adapter on a previous socket driver upload and that seemed like a good idea. I didn't have any adapters handy but when looking for one I came across a hex drive socket, which serves the same purpose for my use case. Not as flexible as using an adapter, but 3d printed wings can be used with a hex adapter or any other hex bit.
The inner hex is 6.8mm along the shortest diameter (flat to flat). You'll probably want to adjust the scale for your hex bits, taking into account printer settings, shrink, etc. You can also make it taller or shorter.