Custom headstalls are all browband style. The browband can be a double round or flat.  The throatlatch normally comes with a horsehair tassle and a sliding button, however you can order them without the horsehair, or one that will tie instead of the slideing button.  Other than the color variation and a couple buttons on the browband you really can't vary on the button pattern..they have to be where they are for the headstall to function and be adjustable in size.
Email or phone for more information!