Whilst there are sites that offer additional templates for sale you don't need them. You don't really need
What you do need is to look at the [EDIT] tab (Section A below)
Here you can construct a DVD Menu of your own liking.
Select a layout, Frame Style and Style of Navigation Buttons.
Now you can add your own background and your own background music.
Once constructed you can even save the home made template for re-use in future projects.
For further details please view:
Creating The Thumbnail Menus