I managed to pick up a BSB clock bracket off of ebay. These have been used around 2009 to 2016 for teams such as Swan Honda to the Honda Racing BSB Team. They were made by evotech and dificult to source. At the bottom is a photo of the bracket used on Jenny Tinmouths BSB bike. I spoke to Evotech who explained it was designed to be interchangable in the event of crashes and changed to fit later speedos.
Well I doubt I will ever be brave enough to buy a conversion like this but saw these and the think they look amazing. I find that a great deal of headlight conversion often look tacky and dread it when I hear of angel or demon eyes. These however seem tasteful and do seem to suit the lines of the bike.