Nozzles for 3D printers

Hi guys, do we have nozzles of different sizes for the Creality CR-10 or Prusa MK-II printers somewhere at NB? In particular, I was looking for a 0.8mm nozzle. Please, let me know. Thank you.

Never mind. After exploring further, I realized that nozzles are consumables like filament - reasonable to expect each person to purchase his/her own nozzle.