Many have made one, including, Caitlin Wilson,
I generally followed Camila's diy. My version...
Instead of using the contact paper, I just cut out the ampersand template Camila provided ( I did shrink it a little, I wanted mine on an 8x10 canvas), traced it onto a canvas already painted white, then painted the appropriate areas magenta. I also used an acrylic paint pen in white for touch-up. That pen is genius. And voila- c'est fini!