You can use this template to create your own Mini Blocks.
I've noticed that the current Mini Block Template on the site has some minor problems so you can use this as a replacement.
There are three images you can use:
1) The first image is a single mini block template file.
2) The second image is a multi mini block template file. It's an A4 page that fits 8 blocks.
3) The third image is a texture file that you can use to create your own blocks. To use the texture file open it up in your pixel graphics program (such as Gimp) and draw your block textures. Next, resize it to 800% then copy and paste onto the multi mini block template - it should fit perfectly.
Pixel Papercraft Admin
Click on the papercraft design image.
Make sure it has not been resized by your browser (you might need to click the image again).
Print using your browser's Print function.