Finally opted for the NBS fork brace, mainly because it was the only metallic one I could find available.
Unfortunately it is cast in aluminium before being machined, so there were quite a few pock marks in the finished item due to
air bubbles.
Who ever had decided to polish it also went over board, because even the stainless bolt socket heads on the fork clamps had been rounded on places, as well as one clamp in the same area being worn down by the polishing wheel!
I decided to fill all the pock marks with JB Weld and built the worn areas back up with the same.
I then needed the top of the clamps machining to allow the dust seals to sit properly and be positively retained in place.
Finally some primer and a finishing coat of satin black.
A lot of work considering, but I'm happy with the result.

