Heli-Bars is one way or you can covert to 7/8 inch bars. Neither way is inexpensive.
To go the 7/8 inch bar route you will need the bars of course with bar ends, and longer brake and clutch lines. You will probably need a longer choke cable depending on how high you go. You will also need adapters to mount the bars.
I have done two 7/8 inch conversions, here is a picture of the first using Goldwing Gl1200 bars.
