Large old saucepan/pressure cooker (Riverside B98)

Hello! I'm looking for an old, large saucepan/pot or pressure cooker that I can use to dye some clothing - apparently once a pot has been used for dye, it's no longer food safe, so if someone has an old pot that could become my designated "dye pot" I would really appreciate it! The condition doesnt matter as long as its watertight and heatsafe :)