A one man shop in Colorado makes the grips they are designed for crutches, bicycles. The guy swears he will make a set of motorcycle specific molds, I've been kinda coaching him on what needs to be changed, less "finger grooved", longer, option for heaters. I absolutely love them. If he gets the MC version done they will be on all my bikes. Very soft, relieves hand/wrist numbness I otherwise get. If the K1200 didn't have heated grips they would have been on it for the trip.
http://www.siligrips.com/?page_id=18