Adafruit does a great job of making their 3D designs available in Fusion 360 archive format. That made it easy for me to modify their TFT FeatherWing Design. Specifically, I made four changes:

• removed the on-off slide switch on the left side
• added a slot for a micro rocker switch on the top
• added openings for the two 2.1 mm panel mounts
• added openings for the 2two Banana Jack panel mounts
• increased the depth to allow a Stacked FeatherWing (the INA219 Featherwing) and assorted wires

I've uploaded the STL files in the documents section, and I'm linking to the Adafruit post containing the original CAD files -> https://learn.adafruit.com/3d-printed-case-for-adafruit-feather/overview