the_real_maverick
My understanding is that the reference board design with the black edition doesn't have any issues. You're not likely to get a backplate as that wasn't EVGA's offer. Also, you'd be better served contacting EVGA directly for answers.
You must be blind. The GTX 1070 SC Black Edition (08G-P4-5173) is listed as one of the models that are defective and has the IDENTICAL PCB board and ACX 3.0 cooler design as all the other 1070 units that are having issues. I would recommend you do some research before posting here again.
The fact that EVGA didn't originally include a backplate on the Black Edition units is irrelevant now as it is REQUIRED for the thermal pad fix.