I made my own out of polycarbonate. I am sure I will have to replace it, and it will scratch but it coslt me $40. So I can make a couple. I wish I would have made it a bit shorter. I think about 16'' height is good. I just left the bottom straight across and put some fuel line under the middle to keep it from wearing thru or scratching the dash. Works really well and doesn't get dusty with the top and bottom letting air thru. I will attach pics when I get a chance! I bent it at the top to give some strength.