Next week, I'll phone to this mate to whom I used to deal with ... I'll not be surprised to learn they're still available...
By air tube, do you mean the big carbon part from the nose fairing to the airbox, around the steering column ??? (Sorry but I'm not very familiar with english language ...)
I made a big mistake when I installed this carbon part ... I forgot my camera and have any pic ...
Which exact dimensions would you like to get ???