Hey folks, first post.  I bought a used Phantom 3 4K, but it came set up as an agricultural bird, with a Kolari Vision modified NDVI +Blue camera.  After looking at a few YouTube videos, it seems like the camera itself should be pretty straightforward to swap from a parts camera from a wrecked quad, but I'm not seeing any classified ads anywhere in particular for drones.  I also have an Inspire 1 that I'd like to get some spare parts for, and I have a Phantom 3 Professional that I need a whole gimbal/camera for.  Basically, I bought a yard sale, and need to fix all of them so I can get them working, and I've been drinking from a fire hose learning about it all.  

Where can I go to find these parts other than ebay?

Hello and good day. Thank you for reaching out and for the inquiry. We do not suggest you to personally fix the drone DIY. It is best to contact our DJI Support team for us to help you further with the said issue on the drone that you have purchased. Thank you.

https://www.dji.com/support