I'd say they're quite simple to make, but I couldn't do it myself. A normal print brick that you can build on. Names would go as following: 1x1F Build Print, 1x2F Build Print and 2x2F Build Print. No need for special icons, the default ones are good. (base/client/ui/brickIcons) Major extra cookies if someone makes
Ceilings Print Bricks buildable.
Trust me, this makes your life much easier.
I found an old topic about this from 2008, people weren't too fancy about the idea. New try.