Yep understood C7ZZ...is a (service) part number and C8ZB...is an engineering number but are you saying the part in the photo (C8ZB...) is what I'm looking for? In other words, C7ZZ-6511202-A is the part number for engineering part C8ZB-6511202-A?
I guess we might know if we had a photo of Chris Brown's part, as it was claimed it has the correct engineering number?