A much cheaper option to the Doubletake mirrors are the these: Acerbis Dual Sport folding mirrors.
They use same priciple of ball mount, so will rotate if bike hits the ground, and they can be folded away.
The only negative they have vs Doubletake is that you can't release the whole mirror as easily as the RAM mount.
Cheap too : http://www.motorcycle-superstore.com...ew-Mirror.aspx
Bookmarks