The original levelling knob may not be the easiest to reach and control during the adjustment.
There plenty models out there on Thingiverse, i have chosen the following: https://www.thingiverse.com/thing:2551220
Once the first one is printed and confirmed to fit the existing knob, print another 3 grouped close together to reduce nozzle travel across each unit. Depending on the slicer used, may even print them sequentially instead of concurrently.
