[fock]

face mask: some variation of paper cloth. Go to the local cellulose factory (I doubt every city had one back then, they were and still are near cheap energy/wood), specify the quality of the paper you want and get it (you have to pay for it, because today they are probably producing paper for $$$ bills). Some yarn: cotton/wool has always been imported in some locations, a local workshop will build a spinning machine @1918s quality in no time. The same for sewing machines (those things haven't changed a lot if you don't factor in automation (which even today noone bothers to pay for the existence of cheap slave labor in Bangladesh)). Soap bar: we have a lot of animals around here and butcher them locally giving you everything you need (https://www.essentialchemicalindustry.org/materials-and-appl...). You just have to find someone who is willing to do the necessary stuff 1918-style :)