bending Gal. pipe - how to

Hi I have this project . I am making a canvas frame for my little 1940 chevy military truck. I restored this truck many years ago, and never got around to making the frame for it . The frame is 3/4"gal pipe with a OD of just over 1" . A fellow Chevy owner sent me these pics of the frame . Does anyone have any ideas, tips on how to bend the corners to a 6"radius ? Maybe I need to make a jig . there are 3 bows to make . The folding legs on the side are for removing the frame and setting it up on the ground as a shelter . Thanks Mike. PS the chap who has this frame lives in Canada ..hence the white stuff

Attached Images

• frame1.jpg (123.3 KB)
• frame2.jpg (122.2 KB)
• 2new.jpg (53.5 KB)
• 8cwt-1.jpg (55.3 KB)