Once you determine what threads you need at either end, the sky is the limit. There's tons of braided metal flex lines available online:
Flexible Metal Hose (High Temperature) for Air Compressors or Vacuum Pumps, 304 Stainless Steel, Carbon Steel Male NPT Fittings with Corrosion Resistant Coating (18" Length, 1/2" NPT) https://a.co/d/gYHtvAe
Flexible Metal Hose (High Temperature) for Air Compressors or Vacuum Pumps, 304 Stainless Steel, Carbon Steel Male NPT Fittings with Corrosion Resistant Coating (18" Length, 1/2" NPT) https://a.co/d/gYHtvAe