I put a set on my 03TW for those long rides. No metal in my old knees yet but I'm getting there. I was fortunate and had these made up at work before I retired. Great addition and my knees thank me for them on the long hauls. They are bolted to the skid plate brackets and the pegs fold up when not required or when the bike takes the occasional nap . I have a pair of Happy Trails highway pegs on my V-Strom. The price isn't bad and they could probably be made to fit a TW.
Home page for Happy Trails website