The procedure for getting your TiVo operational past October 2017 is here:
http://hd.oztivo.net/twiki/bin/view/...oKeepUsingTiVo

For those who are competent at soldering I can supply small quantities of the programmed PROM chip and (optionally) sockets, and the full document on how to do the swap is here:
https://drive.google.com/open?id=0B5...VFmbzhoYTItYk0