wow, that's too bad about your adviser position. I know your Regional Adviser is slow, but maybe you could speed her up by calling her instead of emailing her. If that doesn't work, I would start calling other regional advisers. We have a Collegiate Network Specialist (CNS) and her "boss" is the Collegiat Network Director (CND). She is in charge of all of the Network Specialists. I hope that wasn't too confusing. But if I had problems with my CNS I would go directly to the CND.
As far as your chapter adviser situation, maybe you can get a list from your headquarters of alumnae that are within a 40 mile radius or something and send out a mailer under the pretense of an Alumnae Appreciation Sisterhood Event and then try to recruit more advisers