A recent order: reversible ring sling in pomegranate cotton batik and peacock silk dupioni. Create a custom silk/silk or silk/batik reversible sling for $70.
Or, if you're a DIYer like me and know your way around a sewing machine, make your own. Directions are for a single layer of fabric. To make a reversible sling, stitch the two layers together with the rights sides facing each other, leaving one short end open. Press & turn, then topstitch 1/4" from the edge. Then proceed with the tutorial.