Take a look at what you have sold and what you have in inventory. The pieces that sold are, for the most part, generic - no real theme, just color. I would suggest going in that direction. Also, what about embellishing some of your frames to make the boards super "girly". Damask is a popular print right now, so are vintage prints. You can find "vintage" looking prints in stores right now and not pay the price for the vintage fabric.