More to explore:
I think that might actually be an old marimekko fabric or kokka fabric. Here's a cute one on spoonflower though http://www.spoonflower.com/...
Crazy idea, could you stamp your own fabric? These stamps on etsy look similar to the print on the dress. http://www.etsy.com/listing...
Found it!!! http://imaginefabric.com/ec...
Reminds me of a print that is in the Eva Franco Spring/Summer collection.
This is adorable!
Fun, party dress!