No retailers sell Crofton slow cookers as of March 2015. Amazon.com features a listing for a Crofton slow cooker, but states that the item is unavailable with no estimated date for return to stock.
Currently, only secondhand sources offer Crofton slow cookers. A used 1.5-quart Crofton slow cooker is available on eBay for $11.25, as of March 31st, 2015.
An alternative item available on Amazon.com is the Proctor Silex 1.5-quart slow cooker, which retails for $15.85 on Amazon.com and features three heat settings, similar to the Crofton product. The Proctor Silex slow cooker is also available at Target and Wal-Mart.