Thanks, but you are late to respond
We already know the info, posted by you.
Yes, Google has changed the URL for intra day data, and that was the core problem, as it rendered a few utilities/tools (to download/backfill data) nonfunctional.
But, our friends here, have developed fully functional utilities/tools, for the same. If you too have any such tool/utility to share, then if you like, you may post details.