I hate to see a question just sit there.
I loaded a nice set of textures but it was a long, long time ago.
I know the author lived in Japan and they were Freeware.
I also know I got them from FS.com, so my reply is mostly worthless.
Still, I've repurposed a lot of stuff from my FS9 and FS2002 installs on this machine over to its newer brother.
I'll probably be looking for better textures once I figure out what the new GPU on the newer machine likes.
This does bring up a point, what do
YOU think the water should look like?
If you're Nordic or live in the higher latitudes, it should look very dark blue to almost black with wave tops.
Polynesian or Caribbean waves would be a brighter blue, etc.
IMO, most of the good water textures are Freeware so feel free to try out different texture sets or even mix-and-match the ones you find.