It looks like those toys announced a few days ago on the MLP facebook page are coming in August. A website called Big Bad Toy Store has these and more listed up in their pre-order section.
Along with those are the second set of Blind Bag ponies, and a bunch of other new toys. It sounds like August is going to be pretty crazy on the merch! Hopefully they are a bit more available than those blind bag sets from Toys R' Us a while back. I'm definitely looking forward to picking up a Gilda.
Thanks to James for the heads up!