3x4 rectangle tube 14 ft

I need to replace a 3 x 4 in rectangle galvanized tube 14 ft in length on my boat trailer. Where can I get this part locally? This is the tongue of the trailer and it is all bolt-on, so I will try to replace it myself.

J-16 Carolina Skiff

iron knight trailers in North Charleston or tommy stone in mt pleasant

www.teamcharlestonmarine.com
www.bombislandboats.com
IF I RESPOND IN ALL CAPS, ITS NOT ON PURPOSE, AND I AM NOT YELLING