I’m selling a new pair of Shimano ST-RX815 Di2 Shifters + BR-RX810 Hydraulic Brake Calipers and hoses.  Sale includes GRX Di2 Left & Right levers plus Front & Rear GRX Flat Mount Calipers. These came with a new group but I built my bike with Ultegra levers and Hope RX4 calipers to match my road bike position and add some bling to the brakes.

I’ve got extra wires and junctions as well if you need more bits to finish off your build

Good luck!