You could try downloading new waves, I think there were some over at avsim, but I can't really remember if they were very good. Search for waves in the FS2004 scenery, I don't really know much about this though, so I would wait for someone else's opinion.

I've often though about this though, is there a way that someone would be able to post all the default texture files or parts so anyone who has little mishaps like this would be able to easily replace their missing or broken textures. But this shouldn't be necessary if anyone backed up their files, but who does that?
