oh cmon srsly? why would a fodder want to steal it if he couldnt use it anyways? it's not like nagato or karin were going to pay him more than it would cost to secure his ass from the o so forgiving anbu....
let alone the fact that your saying this scroll is only readible by uzumaki (they don't even have special ocular powers as far as we have seen)
i like your idea of it being the so6p's scroll but wouldnt it have been mentionned at the ginkaku and kinkaku fight...?