There's also some cases that look more fitted to the rode like this. And $20 isn't that bad to protect your device

https://www.amazon.com/CASEMATIX-NT-USB-Case-Condenser-Microphone/dp/B074Q2STL5/ref=mp_s_a_1_3?dchild=1&keywords=rode+nt1+case&qid=1631073026&sr=8-3

But even with that, fully agree with Fiona, definitely keep it as your carry on/under seat bag so you can have eyes on it at all times