Call the store directly or search their online site. If not available prepackaged, they can always custom cut any size mat in many color choices.
If they don't have them pre cut in the size you need, they can custom cut them for you to fit whatever picture you would like to frame. They come in a large variety of colors and decorative options.
Possible. Just call ahead and talk to someone in the back.
Yes, they can do that for you. I've seen it done before.
Thanks! Your answer is awaiting moderation.