Understood... not using stock anything for the bracketry. I'm custom fabbing a bracket system to interface between the mounting location holes and Recaro slider and a suitable mounting point for the stock seatbelt receptacle.Just no seats will fit the stock brackets. Many have tried.
Have done this before... custom design/metal fabrication is the easy part - bypassing the seat SRS system and allowing everything to work and see things nominally is really the more difficult part. A correct value resistor to the seat SRS airbag circuit should do the trick. Its really just a matter of knowing what the system is looking for and matching that value - not too terribly difficult if value is known.
A 3.3 ohm resistor is all it took for my '13 FR-S when swapping out the factory airbag seats with a Recaro Sportster CS. Need to dig more in the Frontier factory service manuals to see if there's any testing parameters for the seat SRS connections.