I found some! I took them home and will "test drive" them to make sure they stay comfortable on. If anyone else is still searching, they are Kelly & Katie Jade riding boots at DSW (http://www.dsw.com/dsw_shoes/c.....and=300191). More casual than dressy, with a low lug heel, a rounded toe, a strap around the ankle, and a little knit band at the top to keep them in place. Suede, but okay for drier climates and also okay in wetter ones if you waterproof like mad.
I got both the black and the brown. They hit nicely below the knee and make my calves look proportional. Never thought I would find mass-produced boots to fit my slender, slender calf! Just delighted!