Here is the link to the hand guards and only $39.99. I have them on my 310R and my wife has them on her 310GS. We put some decorative duct tape on the inside to cover the holes.
https://www.cyclegear.com/parts/trackside-brush-guards-with-aluminum-mount
https://www.cyclegear.com/parts/trackside-brush-guards-with-aluminum-mount