After a recent lane-changing 'experience'
, I'm thinking it might be pretty nice to have some turn-signal indicators in my side mirrors. My '07 EL XLT doesn't have 'em, and I'm wondering if the wires and such are already in there, there's a plastic piece below the mirror glass where the indicators would go, and maybe I can just get the necessary pieces from Ford to install the indicators? Has anyone done this?