Many of us have Electric Quilt or other programs that can size blocks to whatever size we wish. I'm a bit hampered since I'm out of installations and so don't have it on my current computer and don't have the ability to easily print from my other system -- but I'm sure someone on the board could manage to print out some patterns for you, if it comes to that.
For blocks designed in thirds that finish to 12", you can use graph paper, instead of 4 squares to the inch (make sure you don't get the 5 squares to an inch grid!), you would use 3 squares as an "inch".
It's a little harder for blocks designed forths, but still doable via graph paper.
Or, and maybe easiest, you can use information like this worksheet
https://www.rapidresizer.com/home/20...rcent-or-scale
and adjust the pattern on a copier -- I often use my Staples near me for all sorts of quilting related stuff
