I have a Seneca( pre warning and without "Seneca" stamped on the barrel) that I might be willing to part with. It's .36 cal and shows normal wear. The bore is good.
Also have another barrel assembly in .40 cal, 34" long with a traditional brown finish and fixed sights. Green Mountain barrel...round ball twist. It will drop right in but needs a new barrel underlug....easy to get and install.
PM me if interested.