I'm not sure if you're asking where to find matboard or where to find pictures of the matboad journals? So, I'll just answer both.
You can search the gallery for matboard journals and I'm sure plenty will show up. I personally have one in my gallery. They're alot of fun to make. Very pretty gifts!
Gallery at Splitcoaststampers
I also have instructions, if you need them just PM me.
You can find matboard at Meijer, Wal-mart, Michael's, etc. It's usually n the picture frames department. You'll find matboard for pictures. The solid matboard is usually all the way in the back. A friend of mine used the foam matboard. It's not as pretty, but it's up to you. Have fun!