Here's what I just bought. I haven't installed it yet:

Usongshine J-Head V6 Hot End Full Kit 1.75mm 12V RepRap 3D Printer Extruder Parts Accessories 0.4mm Nozzle https://www.amazon.com/dp/B07J9PYH76/ref=cm_sw_r_sms_apa_i_mZ7jEb3DG4RP9