Here is a thread discussing pipe options and modding the 440 pipe to get you by until a better option comes along.
IQ Pipe OptionsPost #26 in that thread shows a few pictures of a modded 440 pipe as well as Post #27. Read through the whole thread. It discusses exactly where you can buy the U Tubing as well as a few guys who have extra pieces of tubing left over from their pipe mod projects.
There are other threads about the 440 pipe mod, you may have to search for them.