In Europe the DBA replacement discs still come with replacement locknuts. The discs themselves look to be of good quality and are attractively priced. A few caveats though: The DBA EU distributor took 3 months to deliver them due to COVID and I’ve unfortunately had to leave the car with my mechanic because the bolts could not be reused due to the fact they were impossible to tighten to the correct torque because the bolts were heat damaged (They were a nice shade of blue and they stripped when he attempted to torque them down to the specified 13nm. I didn’t think that I used the brakes THAT hard. :-)) He had to order 4 sets of AP bobbin kits (one set per disc) from Germany. (Expected delivery in 3 days and yes, I know that they're M6x1.0 Bolts that probably could be bought much more cheaply separately, but these are a critical point of failure item and the local hardware store might not have the correct quality.)
Frankly, if knew that this would occur, I would’ve ordered some J-Hooks from AP because they come with hardware. We’re locked down here in Europe and my installer is across the border. We have to get COVID tests to cross borders so I’ll have to get another COVID test to pick the car up next week. The price of the bobbin kits and the inconvenience incurred negate any cost savings.
In closing I have to thank Petr and his team at Auto-Impex for their excellent and knowledgeable service. If you need some work done on your GT-R in Central Europe they're the people to call.