Kansas City has an active group. Of course, STL, too. Not sure about Springfield. You may have to go online and see what you can find.
Is this pnm living in Missouri and then planning to attend U of Missouri? She should be able to easily ask around in her town. Many small towns in Missouri that have Greek women living there who write recs.
The website for the Greater Little Rock Alumnae Panhellenic Association is www.gogreeklittlerock.com. PNMs do not have to be from the Central Arkansas area to register.