nut size

So i bought a pretty heavily used Ibanez RG5328 on reverb and am in the process of fixing it up a bit. One of the main issues was ( i think) the nut. It looks decently worn and i was getting some pretty bad buzzing on the open B and A strings. The graphtech 1354-00 is a bit too narrow and...

So im lookig for a first seven string and I've realized my problem is that.the distance between the strings is bigger than im used to on my sixes so im looking for a neck with about a cm shorter than.a rg7321preferably thinner neck ibanez style maybe a bit thinner I just cant find one any help?