I've already fixed this issue with a total overall of all SFX and the sound engine - which will be released soon. The problem is not the effects, but the hard coding that leads to the effect not being played.
http://forums.qhimm.com/index.php?topic=17591.0 See the database.
Battle tab, entry 51.
Ah, well never mind then. Still, I feel good about actually fixing it myself with my fairly limited knowledge on this sort of thing. Incidentally, I basically added the missing sounds via Audacity. They sync up pretty well with the onscreen visual effects too. But obviously your fix will be better overall.
The best way to share these things is to either release it as a patch or installer that can be applied to an existing audio.dat or to release the sound effect alone and instructions on how to add it to audio.dat. As a general rule, we don't allow full data files to be shared because in addition to your modded data, they include a significant amount of copyrighted data from the original game as released.
It might be a bit overzealous, but given Square Enix's history of shutting down mods and the fact they haven't taken action against this site, it seems to be the right decision.
That's why I felt it prudent to ask first. Sadly, I lack the knowledge to make a patcher. Instead, I'll link the two wave files I compiled to make this instead so others can add both themselves, as you suggested:
http://www.mediafire.com/file/x190efb8d59bn57/568.wavhttp://www.mediafire.com/file/568mj151sm413jt/643.wavThey're both named after their respective numbers in the audio.dat file, so replacing them is simple in Cosmo. Thanks again guys.