I wasn't directly satisfied with any of the current options on Printables, and I wanted something that could store a large amount of soldering iron tips, and be easily open-able. It uses 6 × 2 mm magnets.
Amazon Link: https://a.co/d/jkywo8N
It may not fit all tip sizes, but it was good enough for me!
I included the F360 model file if you want to modify it.