I haven't seen that size, but the rolls of 3M sticky paper for a Porter-Cable quarter sheet sander work great. It looks like the same paper.
I use it all the time. There are many more grits. It seems kind of expensive until you see how well it works and how long it lasts. It sticks to just about anything pretty strongly, so you can stick it to round blocks, little blocks, etc.
I have several rectangular blocks 4" long that I just wind some of the paper onto, then, as it gets used up, you tear one face off at a time.
You might have to find a real tool store or order it online. It is marketed under the Porter-Cable line of tools.
I have a friend that has been making stunning custom rifle stocks for many years. He had always used regular sandpaper. He thought he had died and gone to heaven when I showed him the sticky paper.