Michaels has archival packs of 25 120 sleeves made by Albox Australia for $26 (among other sizes they have).
I wouldn't be too pedantic about PrintFile; I have experienced their sleeves coming apart at the welds over time — it's a name I avoid, unfortunately.
So long as the manufacturers has passed the PAT for archival-quality sleeves you can buy whatever is available. But not Chinese-made stuff.