Good news. The bar for fitting the C-bracket is still there. Much celebrating at 7.30 this morning!
Having done a test fitting of the stand, I am surprised how far away from the silencer the stand is when folded up. The silencer is an aftermarket item so can't be fitted with the Honda rubber bump stop and is a different shape from the original Honda silencer. Does the Honda original (and the Dave Silver copy) have some sort of extension that ligns up with the stand or is there a bracket that does this? I can't see any likely bracket on the Honda parts list. Maybe I just need to make something up, but I do prefer to use Honda parts if at all possible.
Thanks a lot for your help so far. Being an oldie who doesn't do "social media" as I can't see the point, I have to say that I do like internet forums like this one. Sharing knowledge, rather than opinions, has to be the way to go.