Copying standard game camouflages to become custom skins

Hello,
i am currently in the process of fixing all the blk on my german naval vehicles to make their custom flag work again, only problem is some of these vehicles don’t have custom skins on wt.live and therefore their i can only use their template which is broken either because they are black or full of SAMPLE.

is there any way i can copy the default camouflage or selectable camouflages and make them a custom camouflage so i can use my flag without errors?

@Community Helpers

I’ve only played with ground and air skins but according to this you can just work with them the same as ground