You can find them here.
Here’s a nice little deal from Teenage Engineering for the holiday season:
Winter is here and Christmas is coming up! As a holiday special we are now offering you a great deal in our webshop. Every OP-1 purchased during this campaign includes two free accessories and free worldwide shipping. You will get the OP-1 Portable Synthesizer, the FM Antenna and the Crank Accessory, shipped to you free of charge, regardless of your location. Standard customs fees may apply and are not included. Place your order now to make sure you get your OP-1 before Christmas. Offer valid to December 17, 2012.