I have done the same. I bought a tablet mount on Amazon with a 4 bolt mount (metal, not plastic). I drilled 5/32" holes through the left side of the passenger handlebar. I was only able to fit three of the 4 bolt holes given the size of the bar but mounted my 10" tablet on it last week and it was completely stable during a four hour rock filled ride. The location is just above the handhold and close enough for me to reach from the driver's seat while low enough to not block any forward sight lines.