[Fizzlemizz]

The reason for the "I don't think it will achieve exactly what you want, which would probably require custom textures" quote.

You might get slightly better by fiddling with the coords/edgesize etc. but, the Backdrop borders take up edge space, the beveled corners require it be more than just the border line width. You could export the FauxScroll button textures and resize the image/add a border and use those instead.

You could maybe add seperate "border" textures to the buttons.