I took the E3D Titan Aero bracket design and using OpenScad, I created a bracket for the Bukobot V2 to hold two of the Titan Aero extruders.
inland PLA+ PLA
I used a drill bit to countersink the holes in the front of the bracket so that flathead 4-40 screws could be used and not interfere with the extruder. I am currently only using 2 screws at the edges of the bracket and one in the back and that seems sufficiently rigid. I put small pieces of tape under the front of the bracket under the extruder that was closest to the bed so that both nozzles ended up at the same height.