An anthology that immediately jumps to mind is “Sex at the Sports Club” by Black Lace (an oldie but a goodie). This obviously features lots of sporty characters and many of the ladies are lithe, muscly and small up top.

Also, Janine Ashbless tends to write tough, warrior-like heroines of a similar ilk.

In my own stories I try to be mindful of covering a range of body types including small, sexy boobs!