I would like to purchase a stock 06-08 goldwing , I don't want to pay all the extra $ for abs, nav. etc. One thing I would like though, is the heated handgrips. I do a lot of riding in cold weather , living up north. I don't care if my rear end (ass) gets a little cold, but my hands are a different matter. Can heated handgrips be purchased separately, how much do they cost, and are they easy to install?