Folks:
I have found an unlikely source for a set of splash guards that integrate quite well on the front wheel wells of my 2008 Edge Limited. By coincidence, I discovered that the same GM slash guards that I have on my Buick Century have the right notching and contours to fit the Edge, so I ordered and installed a pair, and, I believe they look quite nice and unobtrusive. The GM part number is 12497418, at least that's the number here in Canada. They are made for the front wheel well of the Century. They can be installed very easily by using the two existing screws on the Edge fender; you need only hold them against the screw head, give them a tap with a hammer, leaving an imprint that can be used to drill the two holes; remove the two existing crews and use them to install the spash guards.
I tried the Ford ones, recommended for the Edge but found them too big, and unsightly...no integration at all; so, for half the price, I have a nicely integrated set of GM splashguards that fit very nicely.
AGR