Re: Correct Terminology ???
If you search ebay, you need to search on "cowl", "cowling", "hood", "cover", etc, because the terminology is not consistent.
Also look at your local dealers/boat shops' boneyards. Rember, just get one that fits, it doesn't have to be same HP, just the same size of engine and the same "era". Of course, Evinrude will fit similar size Johnson.
Then, if needed, it is pretty easy to re-paint. Just strip, sand and do a good paint job. You can often get it prof. painted at a body shop for cheap. Easy to find OEM paints or have paint shops match. New decals are often available on ebay or from dealer, or you can have a local sign / auto trim shop make some for you.