Elder Scrolls IV: Oblivion — Grand Soul Gems?

Question

In the Elder Scrolls IV: Oblivion, I recently got Vampirism. I want to cure it. I found a witch who told me she'd help me cure it if I found her five Grand Soul Gems. I've already stolen two of them from the Chorrel Mages Guild, and I bought one from there, too. So that's three out of five. Does anybody know where I can find two more Grand Soul Gems, please?

Thanks

Answer 1

Most of the Mage's Guilds and magic shops will have them. Do some fast travelling.