Wanted a little more leverage so whipped this up in Fusion 360.
1) Took a pic of the existing knob. Took a dozen attempts to get a good one lol
2) Imported pic into Inkscape to get an SVG
3) Imported the pic and set scale into F360. Shout out to https://www.youtube.com/watch?v=ck\_qkddLfd0
4) Imported the SVG and lined it up.
5) Extruded to have a body that got close to the existing one.
6) Designed a cover to snap fit over. Shout out to https://www.youtube.com/watch?v=PGx-9ayIxNk
The author marked this model as their own original creation. Imported from Thingiverse.