Vista - [XAML Beginner] how to customize my list box?

In my app (using WPF) I have a side bar displaying a bunch of option.
I display the option with a list box and some databinding on the selected
item.

now it's a sidebar, and when there are a lot of item, the scroll bar on the
side is ugly, I would like to replace it with someting like the attached
image.
i.e. instead of having a scrollbar on the right, I want to have up and down
arrow at the top and bottom.

Any suggestion on how to achieve that?
is there an object more appropriate that a list box?

Any XAML code example welcome!