Changing the headlamp is a simple 5-10 minute job and can be done by anyone without taking your bike to the shop. I get my H7 headlamps from the local auto parts store.
The high beam takes a little more work. I don’t have a video but eHow has some basic instructions that should help. http://www.ehow.com/how_6718740_change-headlights-gl1800.html
I was working on some electronics and noticed that it MIGHT be possible to get to the high beam lamp through the glove box. Here is a quick video on removing the glove box. Maybe you can get to the high beam. Give some feed back if you try it please. http://www.youtube.com/watch?v=kb0iXqdSH6A
Post time: Oct-10-2017