It looks like I may have a solution to my windshield wiper dilemma, thanks to a guy named Joe.
Yesterday I received an email from Joe. He also owns a 2008 Ford Escape and had the exact same troubles that I did in finding windshield wipers for the truck. In fact, he also had the same problem with the Armor All EDGE Silicone Wiper Blades that we both purchased as replacements.
Fortunately, he found a possible solution. He came across my blog and was kind enough to share the info with me: Trico NeoForm blade (part #16-2013)
I had read about them in a forum as I was searching for wiper blades, but didn't know where I could find them. Joe found them at Parts Source and said they seem to work fine. What's even better is that they are $24.99 each, compared to Ford's one and only replacement wipers -- the same as what came with the truck -- that cost $30 each.
My wife returned the Armor All wiper blades to Canadian Tire this evening. The girl at the Customer Service counter mentioned that they've had quite a few returns of the Armor All wiper blades. Not surprising.
Oddly enough, there are now two good reviews and two bad reviews of these wipers on the Canadian Tire web site. One of the bad ones is mine.