Fosscore I don't think brembo makes it anymore or at least that I found. But Baer makes a kit that is similar. It uses a bracket to use the stock caliper on a larger rotor.
I originally swapped brakes off a 2007 escalade. It had drilled and slotted front and rear stock replacements. I knew the front was a direct swap. But the rear didn't work. The NBS backing plate is bigger than NNBS. I would of had to trim them or take them off. And for really no gains it wasn't worth it. And if I remember right the NBS is double piston and NNBS is single. So I left the rear alone. The braking was slightly better. But looked better due to their size. A friend was trading his 02 Silverado in and it had a brembo kit with rear rotors to match the fronts. So these brakes really stop when I ask it to. Plus I have hydroboost and stainless lines. The lines made an improvement. Less spongy.
I don't think the swap for NNBS is worth it though. Unless you have the parts for free or very cheap. And they are only slightly bigger.