Very cool that we can do this now.
I had that problem with an old stove a few years ago. Couldn't find a replacement knob for <$50. A friend who does apartment maintenance sent me to the basically secret appliance parts store in town (trades only, no civilians). I got a "universal" knob set for about $12, after they called my friend to make sure I was OK to sell to. Four shaft types, two knob sizes, plates for indicator marks -- four of each. The shafts snap into the knobs (my friend recommended gluing after assembly). Helped me limp that stove along for a good several years.