See bottom of post for update.
This sweatshirt from Left Coast by Dolan retails for $88 at Revolve Clothing.
While not a huge price difference, this version from Anthropologie will still save you $20. It retails for $68 and is a great option if you like the Dolan version. Click on the photo below if you're interested in purchasing (available only in the cocoa color shown).
*Update - 1/10/11* - I just spotted another great option for this top at Nordstrom. It's from the brand Rubbish and retails for $34. It also comes in a purple color - click on the photo below to view or purchase.