I know you can purchase a guide to nurse practitioner programs on www.midlevelu.com. The guide gives information about online and on campus programs.
Also, if you are willing to study to become a Family Nurse Practitioner rather than an Adult Nurse Practitioner, you might have more options. FNP is more popular so there are more programs to choose from. Also, based on my personal observations, you may have an easier time finding a job as a FNP rather than an ANP as many clinics want to hire someone who is certified to see children even if this will not be a large part of your practice.