Did the audio dial on your URSA break as well?
Fear no more!
These are multiple variants of replacement audio dials for any Blackmagic Design URSA camera. They all have the same fit and should pressure-fit perfectly on your camera. The variants have different versions of texture that might turn out better or worse on your printer. I recommend printing all the variants and evaluating the final results.
As a bonus: These knobs are way more sturdy than the original version which has very thin walls.