For those who have had a previous c-section and are a good candidate for a VBAC, you have options. Here are four links to help you, if your provider is unwilling to provide you with a trial of labor or if your hospital has "banned" VBAC's (which is illegal).
http://www.ican-online.org/vbac/your-right-refuse-what-do-if-your-hospital-has-banned-vbac-q (How to fight an illegal ban on VBAC's at your hospital.)
http://www.acog.org/About_ACOG/News_Room/News_Releases/2010/Ob_Gyns_Issue_Less_Restrictive_VBAC_Guidelines (The ACOG guidelines on VBAC. Print this and take it to your doctor and let them know they are violating your patient rights and ACOG guidelines, by not offering you a "trial of labor".)
https://www.aclu.org/files/assets/redacted_03-06-2012.letter3.pdf (This is a letter drafted by the ACLU, when a doctor threatened to drop a patient who refused the surgery, less than 30 days from her due date- which is patient abdondment and illegal. I include it, because it gives case precedence that would be useful in swaying a doctor to honor his patient's rights to informed consent.)
http://www.aimsusa.org/ppbr.htm (This is the Pregnant Patient's Bill of Rights, by the American Hospital Association. Each hospital has their own Patient Bill of Rights, it may help in obtaining a copy from your local hospital and using to outline how not allowing a VBAC is a violation of those rights, as it forces you into surgery.)
http://www.ican-online.org/vbac/My-Hospital-Is-Currently-Not-Allowing-VBAC (Further steps you can take to secure a VBAC.)