Andrew and I haven't had time to update the ns3 model to the current versions of codel, fq_codel, and sfq_codel. I don't really expect that time to materialize.
However I am certainly willing to mentor someone (other mentors would be good, too!) on moving the codebase forward (and developing further tests/papers) and pushing it into the mainline code, this summer, as part of the GSOC program.
https://www.nsnam.org/wiki/index.php/GSOC2013Projects#INSTOOLS_for_ns-3
Any takers? See further below for more details.
The old (may, 2012) ns3 codebase is in git
https://github.com/dtaht/ns-3-dev
and the latest ns2 codebase which has sfq_codel in it is hosted on pollere
http://pollere.net/CoDel.html
Despite the name the sfq_codel codebase has morphed to be very similar to the fq_codel codebase, but they do remain different in several approaches.