Hi Keith. Not many as you say, this is from Nick Millman's "Oscar Collection" he is a very well-respected author and illustrator ( though the caption says MAY be 2 shades of green); there are several in his OSPREY books on IJAAF aces with profiles by Ronnie Olsthoorn but they are green uppersurfaces with dark brown mottle over them, not quite the same. Typically the unpainted airframe shows through.
Can't post here but but you might like to PM me your e-mail if you havn't seen them.
Regards
Nick
https://j-aircraft.com/drawings/nick...7th_sentai.htm