Planning my maternity pics and need a dress!💓

I'm in Toronto and I'm currently 24 weeks and 3 days. I need a dress for my maternity shoot next month (at 28 weeks because the photographer is super busy and won't be free when I'm exactly 30 weeks!) So where did you find or buy or rent your dress?! (I'm talking about long flowy dresses not short ones and not two pieces!)