for specific themed fabric, I usually check spoonflower...they have some great stuff, it just takes a little digging.
http://www.spoonflower.com/fabric/760870 or something like this
http://www.spoonflower.com/fabric/1424061 cute! A word of warning....if you need large cuts of fabric, keep in mind these are amateur designers and fabrics may be created for a specific cut such as fat quarters, meaning they are not always continuous patterns for yardage. If piecing blocks or appliqueing, this probably isn't a big concern but for sashing or backs might come into play.