Army green paint

[gonefarwest]

I am restoring an Iron Horse engine generator set (Pu-5008/U) used by the Canadian Army during ww2. I am looking for some engine paint. Would someone know where I can find some. Since it is for an air cooled engine it would have to be heat resistant. I quess I would need at the most 1/2 a gallon. I am not looking for the exact match but it has to be a drab green.

Thanks, René