We got one at 7 months for a week in August one year, but I had to play with the dates a little bit. Just prepare to be a little flexible and call right at your 7 month window. I hope you get it, we loved it!
July might be hard. Make sure you book something at your home resort at 11 months out and then try to change it exactly at 7 months out. You might get it, but it may be hard to get.