I'm in the same boat you are! It seems that almost all of the hospitals require you to have your CNA before you can work as a tech (per the Missouri Law), unless you can find one that'll train you, and I haven't had luck getting a call back for any of those
I'm currently at St. Charles Community College and they offer a CNA course. Its open enrollment, I think its 8 or 10 weeks long, class is either one day/week 8-3 or 4? and then you have to set up your clinical hours in addition to that. St. Louis Community College also has a program, I think they call it Nurse Assistant for Nursing Homes, I think its an evening program but every time I try to sign up its already full. I'm planning on doing the SCCC one in the spring.