sulfate free 2 in 1?

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so i want to switch over to sulfate free shampoo, and told my boyfriend he should too. he seemed interested, except, he's one of those guys that doesn't do the whole separate shampoo and conditioner. he loves his 2 in 1. does anyone know how any sulfate free 2 in 1 shampoo/conditioner?
i have a feeling it's a lost cause but i thought i'd ask before i give up.
i tried googling but didn't come up with anything.