If you are looking for Metallic skins, there are none better than what vStyler has created. They are Master skins, not free, but are well worth the money imho. If you are a WinCustomize subscriber, you get a discount.
Here are some suggestions:
Metropolis: https://www.wincustomize.com/explore/windowblinds/7815/
Andromeda: https://www.wincustomize.com/explore/windowblinds/7695/
Krome: https://www.wincustomize.com/explore/windowblinds/6919/
Penthouse: https://www.wincustomize.com/explore/windowblinds/7216/
There are other great skins by other skinners with a metal look to them, but these....well, see for yourself. 
