These are the ones I got. I haven't had any issues with them.
https://www.amazon.com/HzdaDeve-Cartridge-Thermistor-Printer-Extruder/dp/B09W98VY14/ref=mp_s_a_1_16?crid=94KH9MZA6T8Q&keywords=flsun+super+racer&qid=1679285192&sprefix=flsun+%2Caps%2C129&sr=8-16