I made one once but it wasn't easy, and it didn't work too good. I think about the only option you have is one that sticks over the pickup cab. Some of those are lower profile than others. I have one now that is one of the taller ones. I wanted as short as I could get too, but the price was right on this one, I bought it used. Even at that it doesn't affect my gas mileage too much, I get 15mpg with it on. Doesn't seem to make any difference whether we are in the mountains or driving in Kansas.