Have you tried the Cobbie Cuddlers from K-Mart? I know K-Mart isn't known for the best in quality, but that brand of shoes/sandals is very high quality, IMHO. The soles are so padded, like walking on air. They come in many different styles, and only cost in the $20-$30 range.
I'd been wearing the same CC sandals for the last 3 years, must have walked a hundred miles in them, no kidding, they took a tremendous beating, but they still are as comfortable as ever. Right before our trip last year, the strap broke, and I couldn't find a K-Mart, since ours closed. I looked online for Cobbie Cuddlers, but had no luck. So I had DH find a show repair shop and the guy fixed my sandal. DH thought I was nutty not to just go out and buy a new pair of sandals, some other brand, there must be many good brands. But I am a sworn Cobbie Cuddler girl.
The first year we ever went to WDW, I wore regular cute leather sandals, not made for comfort, and by the end of the second night, I was crying from foot pain.
Anyway, sorry this is so long, but I've never heard anyone mention Cobbie Cuddlers here on the Dis before!