can anyone tell me where I can buy GENUINE 8331 propellers? I dont want the cheep knock offs. apparently DJI doesnt sell/make them anymore?

Hello there batoad. Good day and thank you for the inquiry.  You may try check our DJI Where To Buy platform on this link ( https://www.dji.com/where-to-buy ) to see if those propellers that you need are available. In addition, I hope that you can get some recommendations from our DJI Co pilots with regards to this inquiry. Thank you and please be safe always.

I have used these last years and no problem at all.
Amazon

I have been using props from Master Airscrew on my Mavic Pro for quite a while now. Master Airscrew is an American company that makes high end propellers for RC airplanes and drones. I have found them to be every bit as good as the OEM props and even a bit quieter. I have been using different bright colors to help with visual orientation at a distance. Since this picture I put white props on the rear.