Most business schools love to put M.B.A. students together with real-world businesses for hands-on business work. If you just start with the main switchboard of the nearest business school and explain what you want, you'll most likely be connected with someone who can help you make arrangements.
I'm glad you ask, though, because you can make it win-win by arranging for class credits and avoid taking advantage of someone.
Tim Berry is the chairman of Eugene, Ore.-Palo Alto Software, which produces business-planning software. He founded Bplans.com and wrote The Plan-As-You-Go Business Plan, published by Entrepreneur Press. Berry is also a co-founder of HavePresence.com, a leader in a local angel-investment group and a judge of international business-plan competitions.