Ok I checked out the site you listed and I think the surest bet to that color would be Green Drab FS34086, it's the color bombs were painted... it is just a darker version of olive drab. If not, I would try by taking x drops of olive green 41 and one drop at a time adding black to it.. then look at the ratio and increase it for what you think your will need. (10 drops OD to 2 black would be a 1/5 ratio etc..)
But I think the green drab would do ya right... I'll see if I can find something I painted that color and take a pic of it and post here for ya later...
-=edit=-
Model Master makes it, it is paint #1710