Centos kernel .config file. Where can I find it?

I am rebuilding a custom kernel. I am on Windows, what is the quickest way to grab the .config file for the CentOS RHEL linux kernel (for make oldconfig). I can't find it preinstalled in the Linux system (e.g. no /proc/config.gz) I am assuming it is in a source RPM somewhere. Do you have a link?


It's /boot/config-$(uname -r).