I emailed their customer service department about the collection and got this as a response:
Hello Liz,
Thank you for your inquiry! We are truly happy to have such loyal and enthusiastic customers like yourself. We do apologize as we do not have any information about a new Mad Men Collection coming out again. We do our best to offer our customers top quality, fashionable merchandise, and we regret disappointing you. Customer feedback is an important part of our business and we will be sure to share your remarks with our design and merchandising teams, Liz.
We appreciate your business and hope that you will continue to check out our latest fashions at bananarepublic.com.
If we may be of further assistance, please contact us at custserv@bananarepublic.com or by calling 1-888-BR-STYLE (1-888-277-8953).
Sincerely,
Shannon
Customer Service Consultant
I suppose there's nothing left to be done about it and I guess I'll just have to peruse eBay like some sap every now and then to see if there are any old items from the past two collections. But let the record show, I was PISSED when I found out about this. Okay, on with your day.