You could just ask the finance officer of the organization. I belong to two organizations this would apply to, and our policy on both is that if someone asks, our finance officers (or equivalent) will be happy to take an appointment and review the records with the person inquiring.
501c3's have to register with the state they are located in - search that state's web site for the appropriate department, and you might find what you're looking for.... In WV, it's the Secretary of State's office, and you can download the annual statement & financials.
As with mud, life, too, slides by.