Need wider style mirrors on motorcycle.?

I purchased my first motorcycle last year, a 1981 suzuki gs450. I have been making upgrades to the neglected thing since I got it. I recently put on drag bars, which replaced the mini hangers. Now my mirrors show mostly my arms. Where can i find wider/different styles of mirrors? Where should I start looking? Also I have seen mirrors that mount on the end of the handlebars/grips. Would those type suit me better?