Billet was probably the wrong term to use, they are actually just varying lengths of old aluminium DG frame extrusion I scrounged out of a skip on a job I was doing where the ancient DG windows/patio doors were being replaced ! Some still around but getting more difficult to find now.i want 1, no i want 2, no i dont, was just being greedy Richard mate, 3 will suffice
as the saying goes Richard mate, 1 mans sh it is another mans gold, got to keep my eyes out for any lying around now, cheers