They might be inside the all script archive from Cancerian.
Still, the fixes for circles inside that package are outdated. They are using an old fix from Rabidness, but Ive found later that this fix isnt perfect and it stills refuses to work in one special case when two same auras from same caster met each other (circle vs evil/good issue only), it doesnt fix the circle dissapearing and it doesnt fix aura stacking (two battletides = enemies roll twice and in caseof spell mantle it will trigger it twice possibly collapsing immediately).
If you are interested in spell fixes you should try my community patch.
It fixes hundreds of issues that NWN Wiki isnt even aware of (as I have impression its there you heard about spell fixes), it fixes the problem with disappearing circles of auras after are transition, it handles the old aura fix issue I mentioned, I fixes aura stacking and it also makes auras and aoes like clouds to ignore spell mantle entirely as they should.
See this document for more info about community patch spell fixes.
