It is "piece of cake" to make it from some of the blank skins... if you have some 3 hours of spare time (which I don't have in a next 6-7 days )
Anyway, there are simmilar skins (mybe the left side of the same u-boat?)
I played with one six months ago (Fubar?).
Why don't you ask (P.M.) Fubar if he has some original ?