I'm not sure a little cable tied mesh will protect something that will also damage the lense. A piece of swinging iron will go right through it. So the problem is to fully protect it you might end of blocking to much light. And if you are more careful, you might not end up needing anything. Besides, one light still works right?
I'm going to file this next to my ain't getting fixed stuff. $150 for a lens when I never move around much at night is right next to replacing my $550 broken alternator. Besides, if the lights are on the front like mine, they are useless for anything but driving down the road. If trying to FEL work they are to high and point to far up. Best thing for that is some mounted on the ROPS like some have done.
Good Luck,
Rob