If you check UBOAT234's FileFront site, you will find several packs of multi-skinned ships, which include just about every single-skinned stock ship that Sergbuto didn't include in his pack (including the NATF).
You can find it by clicking on my FileFront site in my signature, and looking under "Things I Like" (which I use for linking to other FileFront sites).
Also, UBOAT234 has made the following non-stock ships multi-skinned:
- Iowa class BB, Coastal Tanker.
However, the following ships have been reported to have errors when they were made multi-skinned (all others work fine):
- Elco Torpedo Boat, Vorpostenboot (non-stock).
And the following ships are still single-skinned:
- Southampton class CL (non-stock), Fletcher class DD, Essex class CV (non-stock), Type 36A DD (non-stock), plus maybe some other non-stock vessels that I can't think of right now.