Which LED tail light are you using?
I just ordered a complete assembly for my '08E because the guy at my LMS said just the lens was not available. I'd prefer a LED arrangement because the OEM arrangement burns out bulbs and breaks lenses due to vibration.
Also... regarding grips, the ProGrip 780 was for many years my favorite grip, with the 714 being a close second.
My new favorite grips are Spider Grips.