They are not selling it in the US, so for some of us it will be the only way. It is not illegal to make a mod with the different units, and I do not think it is dishonest either. Worst come to worst we can just get the meshes and skins (even create our own if they are locked away good enough) and creat units with the same stats and names, then rename our game to Special Forces.
What I think is not right is making it that if you are from the US you cannot get these things. They have more of a market in the US, so why punish us? Why not make it where both can get it?