Plastic Louvers and Vents Q

[twitchy]

is it possible to get one of those plastic louvers that looks like a scoop, an air intake or whatever and cut a hole, say in your hood or fender or eherever, and install it professionally in such a way that you cant see a seam around it and it looks factory? I was thinking of putting one on the fender and running an intake into it, like the way they come on mustangs (minus the hole in the fender)

anyone do this or have pics?

as well, bondo, can it crack and peel or whatever when it gets very cold? Sometimes my car sees minus 40 celsius (same is munis 40 farenheit)

I dont drive when its that cold tho.