https://www.amazon.com/DG64-00473A-Burner-Knob-replacement-NX58F5700WS/dp/B0824W5FWS/ref=asc_df_B0824W5FWS/?tag=hyprod-20&linkCode=df0&hvadid=385124718670&hvpos=&hvnetw=g&hvrand=14684747143962217435&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1019282&hvtargid=pla-849878369481&psc=1&tag=&ref=&adgrpid=80206127642&hvpone=&hvptwo=&hvadid=385124718670&hvpos=&hvnetw=g&hvrand=14684747143962217435&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1019282&hvtargid=pla-849878369481
Possibly those? They are metal reinforced.