Hi Antoine,
Felicitations on a great find! In the mid 1990’s, two of my friends in Toronto were looking to by a no-frills classic suction-only canister vacuum and they ended up buying the non-power nozzle version of your Kenmore at Sears….in the same Hunter Green colour. A very very good basic canister vacuum. You should have no trouble finding the missing three attachments online as Sears sold these grey tools all over Canada in their stores. You can even get a nice horsehair dusting brush that should fit in the tool storage on the cleaner.