Most stencils I found were made for post-its or pocket notebooks and didn't work for my whiteboard. The board I have came with large tipped markers so I needed something bigger than what was out there. It has three checkboxes and lines, but I designed it so that if you line the top of the stencil to the bottom of the last line then you should get a perfect continuation as if it were one.
The author hasn't provided the model origin yet.