there are tons of notebook patterns on this site:
http://moosebstitchin.net/
I've used them before, and they sew out really well. The directions are good too.
sorry--I should have added that to find them, you need to click on the Cases Index on the left side of the page.
Can you use any notepad pattern and skip to the outline of the notepad to stitch... having already done your own design on the fabric?
thanks did not think of that ! do it for other things so dont know why that did not pop into mind.