it seems k-on was deleted off of animelon, but upon further inspection it wasn't actually deleted, just removed from search and all other interconnecting information was scrubbed
thanks to two random archive.org screenshots in april 2019 (here and here), we still have links to each individual episode
There will be a little popup saying "this episode does not belong to any series" or something like that i cant remember, but you can just click that away and youre good to learn some japanese :3
both for personal use and public (if anyone even comes across my page), i have collated the links here
SEASON ONE
SEASON TWO