I got my 2013 8281ss in Decmber of 2012 and I was told by one dealer that they will be discontinuing that model in favor of the 8281ws, but the 8281ss could still be ordered. The dealer I got mine from had plenty in stock and they are planning on getting more, as a mater of fact I just went to thier website and they had several 8281ss in stock... I have had mine out several times and I love it!!!
I will help you with any questions you may have.
2013 Rockwood 8281SS 5W, Reese Revolution
2012 Toyta Tundra Crew Max 5.7 4x4, Timbrens