Thanks Tardet & Skyz
The sources are historical, two battalions of the 14e regiment were stationed in Spain with this uniform in 1808. Probably not on all Napoleonic period but it is drawn like that on the picture planks I have bought with the white uniform too and we like the white uniform.
I can send you the planks on pm if you want.
Anyway, I can try to make a greatcoat uniform for 84e (it takes time but I think I can).
What do you need exactly? Describe your uniform, which hat, which colours etc...
Actually in my pack, greatcoat is for vistula and white uniform for 45e. Tell me what you want exactly, which class etc...