If you have selvages with the fabric information, you might find more of the fabrics online (maybe one of our members even has some). Otherwise, I would say it depends how short you actually are. The other option you didn't mention that many of us do to get to the desired size is to add borders. I have seen some really beautiful quilts with as many as 5 borders. You could also just get one more color (solid black, solid white or blenders in tan all look nice with batiks) to mix in as a neutral with all of your blocks to allow the batiks to go farther.
I'm sure it will be a beautiful quilt no matter which way you go.