S.D.
Ok, this may sound a bit silly but in your special case, is there someone that could make you 1 ? I have a front porch that you can come in from 2 different sides. The far end 1 always made me nervous because that was closest to cars. So my Father-in-Law made me 1 that fit that spot! If all else has failed, maybe ths is something you'll need to think about having done??
Good Luck!