[CCIP]

Ah, silly of me to assume you were talking about the US, especially since our own Air Force here also has the CF-118 as the main combat aircraft. Aren't they just called F-18 (rather than F/A-18) in Australian service?

Anyway, there are mods for Janes F-18. They certainly don't go that far along compared to something like Falcon, and you will run into a lot of technical limitations of the game, but it's still the latest and best you'll get as far as an F-18 combat sim unfortunately. It does have a basic 3D cockpit from the start though, and it does a pretty darn good job of modeling the plane's systems and weapons.

Speaking of Falcon 4.0, some major mods for it (including FreeFalcon and the latest BMS) do have F-18 cockpits available, but they're still not totally accurate and functional to the real F-18. You still end up something that has the systems of an F-16 pretending to be an F-18. You should really consider fixing up your FSX issue (maybe your install disc is just bad) - the Superbug is probably your only option if you want a modern 3D cockpit, nice textures, etc. etc. Otherwise there just isn't anything out there, and the best hope right now is that DCS will eventually feature the plane as one of their next titles.