Hinge material

[shortarc]

Need a little help. I'm trying to find a source for material to make the hinge tube for a brush hog mower where the wings fold. I need to repair one that the pin froze in the hinge tubes and broke the hinge pin.

The pin is available from Bush Hog but the tubes that are welded on the wing and the main frame that the pin goes through aren't serviced.

I've been searching on the net for a couple of hours and can't come up with anything in the way suppliers, so thought maybe someone here had some suggestions where to look. It's one inch id. but it's a lot thicker wall than pipe.