I personally don't have one but have friends that do and they are all home made. The key is to put strips - like 1x2 or 2x2 on the bottom that run along the edge of your ironing board top. This keeps it in place. As others have said, lay the big board on the floor, flip your ironing board upside down on top of it and draw around it to mark the places for the stabilizing strips. None of my friends have complained about it being unsteady and when I've used theirs didn't notice a problem either.