For a few years now I've been building these motor transport stands for anyone interested. These stands fit all R6 motor generations, and may well fit other manufacturers as well. I just discovered that by reversing the two rear spacers, they fit on the 07-08 R1 motor. You have to remove the small U shaped tube from the front of the motor, but other than that it fits fine. Again, they may fit other generations, and other motor makes, of that I'm not sure. They sell for $55 per set, shipped. PM me if interested. Thanks!
Note: the handles shown are nothing more than BMX pegs drilled out to accept a standard metric bolt and jam nut. The end of the bolt then just spins into the sides of the head.