Generic method for mbox style mailing list archives

Hi,

https://answers.launchpad.net/launchpad/+question/158226 has a one-off solution for mailing list archives in mbox format. As I have a similar problem (I'd be interested in the last two months of the kicad-developers list, but it's by no means important), I'm wondering if a generic facility to download archives in mbox format could be implemented.