The extension replacement, is an easy job. It's also, easy to make one. just take off the stock backrest holder, measure the bolt pattern, and transfer that on a longer piece of steel, or aluminum. Put a 90 degree bend on the bottom, and paint your choice of color. The picture from member okf6b, shows the longer extension, that were available, maybe still are?? I have one. the tall works great, when strapping bags on the back. Otherwise,, I ride with the shorty. 10 minutes to switch them.