Try www.Beemershop.com in CA - very helpful folks. They are US distributor for TracTive shocks from the Netherlands. I've used them and they are terrific, easy Plug-and-Play. Link:
I believe I have an extra used OEM one I purchased awhile back. I'm guessing all year models are same for the shocks? Let me know if you're interested, and I'll round it up and give you a decent price.
A forum community dedicated to BMW Luxury Touring motorcycle owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, reviews, and more!