NYT’s “The Caucus” blog has this item. I could not find a link to the actual survey questions, responses, or cross-tabs.
UPDATE: Here is the poll, and the relevant questions are questions 87, 88, and 89. As Jeff Patch points out, question 88, on disclosure, asks about disclosure by “campaigns” not specifically outside groups. Whether those polled interpret “campaigns” to mean only candidate campaigns or any political advertising, I’m not sure. (Question 88 reads: “How important is it that campaigns be required by law to disclose how much money they have raised, where that money came from, and how they have spent the money — very important, somewhat important, not too important, or not important at all?”)
More interesting is the answer to question 89: “Currently, groups not affiliated with a candidate are able to spend unlimited amounts of money on advertisements during a political campaign. Do you think this kind of spending should be limited by law, or should it remain unlimited?” 72 percent of respondents say that the amounts should be limited: and the question is phrased as to “outside groups,” not “corporations,” “business corporations,” or “corporations and labor unions.”