Mikro-Mir from Ukraine has a new-tool kit of this subject in the works - there are CAD drawings on their Facebook page and as of August 26th it was described as "almost ready" - I assume it'll be under their AMP brand like their S-51 and Bristol Sycamore.
Also, as of earlier today, for those who want their early US helicopters, they have preliminary CAD drawings for a 1/48th Piasecki H-25 Army Mule/HUP Retriever.
Me, I'm hoping they follow on from the Sycamore by doing a 1/48th Belvedere...