The fit is pretty tight so depending on your printer you may need to trim it down a bit. I just had to used a deburrer to shave off the elephant foot an make a nice bevel so it would press right into the frame. The files for the frame can be found on the original model.
The backing is from a remix from @DanielZimmerli to add a circuit backing https://www.printables.com/model/563274-lower-decks-fansets-frame-circuit-backing
The author remixed this model.
I added a printable insert so you don't need to purchase the Fansets Badge.