Pretty basic strip...

Nothing of already done as an add-on scenery to find around: Confirmed.

As things are, you either resign using this strip the way it is, find someone who'd want to make it better for you asking nicely around, or make your own restyling.

If you go for a DIY restyling, even pretty hard restyling, I suggest you ADE9X. It's free. Works with both FS9 and X (though its setup can be a little awkward with FSX, seen it REQUIRES the SDK), allows you to completely restyle an airport from the ground up allowing you, in addition to the basics you may find in AFCAD or AFX (this last is payware though) to add flattenings, exclusions, buildings, objects, fuel switches, wind sockets and so many other things.

The only drawback is perhaps the learning curve a little steep... but once conquered, you'll have all your airports at the tip of your fingers.

FAIR WARNING: only default objects and buildings may be used. Custom ones are a no go. There is a way to add more of these objects beyond the actual default limitations, downloading some BGL files I saw some time ago from the free add-on servers, but then you'll never be able to share it if not with said BGL file that contains the objects you used, and since said add-on .BGL file is not yours (that I know of), you can understand it may become a problem.