I have a child’s Crayola light box from Walmart that serves as my light box. There are many home made alternatives. You can use a window during the day. You can use a clear plastic bin with a light underneath. You can lay a piece of acrylic over the separation in a leaf table with a table lamp underneath. Google home made light box and you will get lots of options. I hope someone can find you a source for actual pattern but if not, you made need a do it yourself option.