Was able to place order 5/22. Subwoofer is New, no longer manufactured and on clearance, previously out of stock.
Frys [frys.com] has new JBL Studio 2-Series Powered Subwoofer (Sub 260P) availble for online order. Shipping is free.
It has a frequency response of 29 Hz - 150 Hz which is quite decent in this price range with 300 watts amplification.
Note: This is a discontinued model from JBL.
Enclosure Type: Braced enclosure with Slipstream rear-firing bass portAudio SpecificationsFrequency Response: 29 Hz - 150 HzAmplifier Power (Peak): 600WCrossover Frequencies: 50Hz - 150Hz; 24dB/octaveAmplifier Power (RMS): 300WControl and Connection SpecificationsConnections: Line-level and LFE inputsControls: Phase switch, level control, bass boost and signal-sensing auto powerSpeaker SpecificationsLow-Frequency Transducer: 12" (300mm)