I was in need of a small flat sanding surface to do some inside sanding that I could not reach with my 1x30 belt sander. I looked at the sanding attachments for the scroll saw on line and they were all for pin end saws and flexible. I wanted a rigid backer to the sand paper so I just made one and it works slick did not cost a dime.
I used 2 pieces of some 1/4" band saw blade that I had precut to use in the scroll saw. I soft soldered them together in a T shape in a little wooden jig. Then I put some 100 grit fabric backed Egyptian Gold sandpaper on it with contact cement. I put it in the saw and finished the job in short order.