Comment by fogzen

The October CPI report was canceled and delayed because they couldn't retroactively collect data during the period of the government shutdown.

You may be interested to know of MIT's Billion Prices project, which scraped the Internet to calculate a CPI. It mostly aligned with BLS numbers, so I'm not sure if it's really worth the effort to repeat. https://en.wikipedia.org/wiki/MIT_Billion_Prices_project