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You'll only need one of the spells and you can make any fortify attribute spell/enchantment. I don't remember exactly who sold them, but I think it was someone in the mages guild in vivec or caldera. Just check all the mage guilds, I'm sure it's in some of them.
When I come to think of it, it probably was the dunmer temple in balmora that i found the spell. You'll just have to by any fortify attribute spell and you can make any fortify attribute