I'm also 5'2" with fairly small calves and I've found that the boots with the zip shafts fit me the best. The Philip Harness Tall is my favorite and is even a bit snug on me, so they might work for you. Some people size up for them but I wear my regular size.
Do they hit right below the knee on you? I was also concerned about shaft height. I love the Melissa Button Back Zip though! I might need to call Frye and see if they have circumference measurements for different sizes.