This may not be what you want. But, I built a 2x4 pine frame that
just fits over the top of my wheelbarrow. The size is about 4'x3'.
Nailed a sheet of 1/2" hardware cloth to the frame, then nailed .5"x
1.5" strips to sandwich the hardware cloth. Used a waterproof wood
sealer on the frame. I've used this extensively for 15 years and it
is still in good shape. I sift compost, soil, gravel, etc with it. A
shovel moved across the material does the sifting--no need to agitate
the sifter.