Yuck. Not good. Most of the automotive parts places do not warranty/replace electrical parts. I would hope you can reach some agreement with Electrosport on this. It sure looks like the part failed, not due to your efforts.
I guess that begs the question: where are the GOOD rotors coming from? I know NOS units are getting very hard to find, and rebuilding them will cost some money.
Luke M
Used to have a 1979 CB750L, sold it as a parts bike, now riding a slightly modified 1984 VT700C. Network/Field Engineer. Central OH, USA, Earth, Sol System, Milky Way Galaxy, Universe.