I just put some on the other day too,same size and style,just white.
I chopped up some R1 aluminum slider mounts to fill in the little recess,then put the slider right on there.Worked great and cost little.
I thought about going longer too,but it would have looked goofy.I laid the bike over carefuly and it hit the slider before anything else.Nothing is garuanteed in a wreck,but its better than nothing at all.