Not sure if this'll work in MIA/FLL, but at TPA/MCO I have been offered Mustang convertibles (Hertz) when I had a compact/midsize like a Fusion or Taurus.May or Sept. is best , but June might be doable, or try to see if they just brought a bunch of cars' keys up to the counter, and ask if you can get one.You won't if you are"holding" for a Focus though.Might try Budget also.It can't hurt to ask, and if not swamped they'll usually try to see if they can.GET the CDW though on that convertible!!!