Due to a shoulder problem, I have switched all of my road bikes to flat bars or moustache handlebars. On some bikes, I use down tube shifters, on some regular handlebar shifters, and on the moustache bars I usually use bar end shifters. Here is the deal. I would like to use bar end shifters on one of my flat bar bikes, but I do not know of a way to attach them. I can invision something like the crummy drawing I'm attaching. Hopefully, you will be able to get the drift of what I would like to do. I have asked several mechanics if there was such an adapter and no one has ever seen or heard of one. Surely, I can not be on the edge of a great invention. Have any of you ever seen such an adapter that I can just buy or am I going to have to fabricate something? Any thoughts would be appreciated. I realize you may be thinking it would be weird, but I really want to make this work. See the picture. Thanks.