Can you buy this materia and/or get it somewhere other than off of sephiroth, cause I sold it instead of my other materia and didnt notice til after i saved. i MUST have it for my master magic.

I'm 99% sure you can, where i'm not sure though. Look around the various shops in all the towns, you'll find it sooner or later.

Try Mideel. They might sell it there. If not then I suggest Wutai.

You can buy it from the guy with the white chocobo in Mideel and from Fort Condor.

lol you sold it. Lucky it comes into store supply following your meeting with Sephiroth...uncanny too.