B5 Systems SOPMOD Bravo milspec Stock
The stock is available from the Bravo company web site at the nice price of just $58.00. For some installations it may require a separate installation kit with buffer tube and other parts.
http://www.bravocompanyusa.com/B5-Systems-SOPMOD-BRAVO-Milspec-Stock-Black-p/b5-system-bravo-stock-black.htm
This is the stock hardware mounting kit, $57.95
http://www.bravocompanyusa.com/Stock-Hardware-Mounting-Kit-Mil-Spec-p/stock%20hardware%20kit.htm