So an update on this. I managed to replace the brake light switch with a generic part from Midas for about R70.
The OEM nissan one looks something like this.
The generic one looks like this
Its a straight swop, the only difference is there is no plug housing on the generic and the female plug from the harness just slots over into place.
Something I want to point out, when I connected the new one and took it for a test drive the car felt terribly down on power and struggled to accelerate. I noticed that the brake lamps were still on without the brakes applied so I needed to adjusted the switch to the correct position so that it was not activated when no brakes were applied. Test driving after, the power was back to normal and accelerated as it should. This proves that the 4.8 auto ecu reduces the engine power when brakes are applied, something I had read about but wasn't sure.
