I tried calling cyclebrakes, but only got an answering machine. I left my name and phone and what I wanted, but they didn't call back. I ended up ordering what I needed from my local shop, which is not Triumph, but has a great bunch of guys at the counter. I ordered the dual lines from the master cylinder set-up, as it will give me more flexibility mounting and better braking as well. My measurements tracing out the old lines came to 48" for each line to arrive at the point on my new bars which is needed. This was generous, but I can always zip tie the excess. About $100 for the twin cables and all of the banjo bolts and crush washers.
Make sure you post some pics of the fitment! :D