didn't have the part, but had the replacement deal I needed.
I broke one of my drone's arms and the motor wasn't spinning any longer, it was an older model so there wasn't a replacement available. Ruko provided me an option to upgrade to a new model to replace the broken drone for $100, and when I mentioned that I had purchased an extra battery as part of my setup, they sent that in the package as well to ensure I kept the same experience with the new drone.