Found them on Amazon:
https://www.amazon.com/Tontomtp-Paperclips-Suitable-Office-School/dp/B09289RHX8/ref=mp_s_a_1_3?crid=LD335XYHK9W3&keywords=lipped+end+paper+clips&qid=1652225663&sprefix=lipped+end+paper+clips%2Caps%2C75&sr=8-3