cuda - Aeromaster used to produce these 2 colors (including MANY other IJN/IJA a/c colors) in their Warbird Acrylic range. These are now OOP, but there may still be hobby shops somewhere that have some left. White Ensign Models
www.whiteensignmodels.com
has a Nakajima cockpit color, but they have yet to produce a Mitsubishi cockpit color (its in the works). These are 1/4 oz. tins of paint. I haven't tried them yet, but I have read good things. The site is worth a look, even though they show no samples (which aren't reliable anyway, since paint color is an additive process, and computer RGB is subtractive)
Good luck. If you'd like, I can post a pic of a Zeke on which I used Aeromaster Mitsubishi cockpit green.