Oh Vested Gentress, why are your clothes so cute, and so hard to find?! Here is a selection of VG attire currently for sale at different vintage-friendly marketplaces. Grab them while you can!
Enthusiast Equestrians:

Amazing 1960's gingham horse dress.
For sale on Ebay, from pinupdresses, $199.

Horses & Clovers Sundress!
For sale on Market Publique, from Clutterist, $75.

Kelly green & Teal blue Horse Dress.
I have it for sale on Etsy, $118.
(Too bad it's not my size, or I'd be keeping it)
Feather Friends:

Pelican golfing skirt, circa 1960's.
For sale on Etsy, from tripoutvintage, $29.

Ducks in a Pond A - line Skirt!
For sale on Etsy, by ClaraPeyton, $32.50.

1970's Sundress, covered in Birds and Flowers!
For sale on Etsy, from HeidiHodge, $38.
(this one's a steal, better grab it!)