Thank you to the kind folks at Famous Footwear in the Longwood shopping center! On Saturday evening, while we were en route to a concert and pressed for time, both of my shoes decided to self-destruct: the soles and uppers completely parted company.
My companion dropped me off at the doorway of the shoe store and went to park as I shuffled inside. The clerk took one look at my now-useless shoes, chuckled and suggested a few possible replacements. I handed her the four pieces of my former shoes and I heard them "clunk" into a trash can.
Her suggestion of a pair of Skechers was perfect. I found my size, bought them and put them on, and we were on our way with plenty of time to spare.