Hi Yuya6104,
That skin has been done in the past by Konrad Krumm. I have it as Konrad_Krumm_VIIc_U201.
Try a search and if you still can't find it let me know and I'll try to upload it for you.
waste gate
I tried the search myself out of curiosity
Here is a link to the page.
http://www.subsim.com/radioroom/show...rumm+VIIc+U201