[boost] asio, drop in for 1.34.1 ?

Since asio did not made it into 1.34 and 1.35 not likely to have quarterly schedules until a release-ready branch is established: Is there a drop in or backported (to 1.34) asio available somewhere? I tried the one from trunk, but this doesn't work because of dependency on system lib, which is not yet available in 1.34. Roland aka speedsnail