I have just received my new grab rail for my Superflash from John Jackson of Classic Bike Racks
www.classicbikeracks.co.uk/ . I had an original one but it was all twisted and bent out of shape. John managed to use it as a template for a new one in stainless. It is a pretty good copy and certainly looks good on the recovered seat that R K Leighton did for me. If anybody is looking for one then contact John.