Retails for $89
This LAL is available through many seller online. This one is from Amazon.
Retails for $37.62
And here is the infant version:
Also available on Amazon, retails for $39.54
These Art Clips retail for $39 each, but you can easily make them yourself for much less
Using the Curtain Wire with clips from Ikea ($5.99) you can add a decorative end piece to match your decor, or even find a pretty close copy for the Pottery Barn options.
These star hooks are from Land of Nod and retail for $12.95 and are a similar look to the PBK Star Art Clips. Wooden star cutouts are also readily available from craft stores.
This one is $.49 and from FactoryDirectCrafts.com
PBK also sells knobs that match the Butterfly Art Clips
PBK Butterfly Knobs retail for $22 for a set of 2.