I came up with this basic template to make eight cards along with several variations that you can make more out of it. You will need to first cut in 5"x12", the second cut in 5"x12" and the rest will be 2"x12". Then go by the cutting diagram.
This is a draft that you will see my handwriting after many whiteouts. I will work on my computer to get nicer drawing.
Tip: Punch out the focal image mat from the base layer that will be covered by dsp anyway.
Hope this will give some inspiration whoever wants to try.
UPDATE: Please click the template to open a new window with bigger clear picture.
Thanks for stopping by!