I had first read about these two years ago but it was these last year at the All Ford Nationals at the Eastwood tent I first saw them and thought  " Man, that's a great idea" .  I didn't buy them because I thought they were kinda expensive at $29.99 for a set of 4, that's $7.50 each, ouch ! I first thought I'd save some money and  make my own, so I made one. I then decided that after buying the square tubing, square stock and .030 sheet that it wasn't worth it to make em either.  I figured if I waited a bit someone would  come back with an affordable version and they did. They're not a miracle of science or anything, just a good common sense design. Not to mention they look a lot better than the one I made.

$20/ set of 4