The Golden Threads lady has a nice tutorial on how to make a custom repeating border the right size. This You Tube video at about 5:10 tells how to do it:
https://www.youtube.com/watch?v=aHXoitox02E
For paper, you can buy hers. Her price is high but it's nice to support her, since she does offer an amazing tutorial.
You can also can get 50 yards of 12" wide light yellow tracing paper at Amazon for ~$9-11.
http://www.amazon.com/Bienfang-Sketc...+tracing+paper