When I think petite I'm thinking 5'4" and shorter.
In that case Amber, Vanessa and Jennifer @ HFH don't qualify as they're all taller (we're talking 5'7" to 5'8").
At HFH: Mia or Selena
At SRM: Sophie or Liz or Mya
At Platinum: Alexis, Christina, Kelly and all very busty
At Allure: Raquel, Kyla, Victoria, Isabella, Cindy
At Silhouette: Christine
At IT: Eve or Sharon
I can't personally vouch for most of these as I generally prefer the 5'5" to 5'9" range myself.