Hi Phil,
Nice Rapide! It looks to be about the same vintage as my late 48. It looks like you are working toward all original, but the VOC spares company has them in stock. Also I see that Michael Breeding has plans to make them, though that may not have happened yet. His should be very close to original, judging from what I have gotten from his shop so far.
Ron
Michael had an un-machined prototype he showed at the Maggie Valley meet. I think he said his target completion was in 6 months
Paul