The new 2012 Frontline and Travel hammocks come with spreader bars. I was unlucky to order the day before bushcraft posted a review on Youtube for the new Frontline.
I tried to get just the bars from DD, but they wouldn't sell them alone. I was disappointed, considering that I ordered just a few days earlier (DD lost some kudos there in my count).
I found the bars from teflon a bit bulky because I want them to fit to the stuff sack, so I made some myself from Easton arrowshafts. I used a 2314 shaft, cut to 4 pieces of 7 7/8'' and a 2014 shaft for two 1'' inserts which will perfectly fit into the 2314 tube.
I then glued the inserts with Epoxy to the bigger tubes and made nubs for the open ends.
All in all 20 minutes work with two left hands.