John
I had a set of instructions and passed them on to Harry Curzon with the plane when I sold it to him. Try contacting him. The instructions were very dated though with servos everywhere. I used normal UP air cylinders and electronic valves on doors and airbrakes which freed up a bit of space. The other person you could try is John Macnamara as he was building one a few years ago. Mine had been started many years before I bought it and I had to deconstruct much of it as the glue had denatured. The slats and airbrakes are the most challenging job to get the angles correct. However when completed it flies really well and looks great.
John