I know I’ve seen one before:
https://youtu.be/VMvKug5LMrQ
Only a brief explanation of it at 0:40, but I looked it up on ewrc-results.com a while back when you could check vehicle history etc. without subscription; if I remember correctly that particular one has not seen any special stage action in years, perhaps decades.
My guess it was either full group A spec parts transferred into a 2-door body or a 2-door group N with upgraded parts and referred to as being a group A - much like when you see an Evo VII, VIII or IX described as ‘group A’ spec. In those cases ‘group A’ loses meaning to me