When this idea was brought up a few months ago, I stated in response that I would pursue it at a later date if no one else had (possibly). Recently, that later date has occured.
RSS Bundler is a program that reads from multiple RSS feeds, merges them into one, and serves the resulting feed using an embedded HTTP server. The source code is available [here on GitHub](https://github.com/TriMill/rss-bundler). The aforementioned GEORGE RSS bundle is available [here](https://api.trimill.xyz/george-bundle/rss.xml).