If you don't know about Frontier Co-op buying clubs:
We operate via a Yahoo group. MDC mamas are welcome to join! Just mention how you found out about us and tell us a little about yourself when applying to join.
We do have a Co-op forum here at MDC. How about opening a Frontier co-op on our forum here? We could feature it to get some attention of the general community. Let me know if you'd like to give it a try.