I have been looking at an old post. I have an idea. Ash are within 8 miles of me and could supply the following. This is what is required from an earlier post on the subject.
two 90 bends with 100mm legs 4 ply 5mm thick wall, and a 5" 51mm O/D piece of stainless tube. See picture on next link!
https://www.the75andztclub.co.uk/for...d.php?t=222856