Along with the blog, I host a mirror of Linux Mint, which can be used with the following URLs:
ISO Images:
https://experimental-engineering.co.uk/mint/iso/
Package Repository:
https://experimental-engineering.co.uk/mint/packages/
This mirror is hosted from a Gigabit fibre connection, from the Manchester, UK area. The mirror is updated twice daily, as per the recommendations of Mint themselves.