Broken AC line.

[barn9]

Had a hinge pin going bad and it rubbed a hole in the line shown in the photos. Found a used hinge to replace it, and wouldn't you know, when I opened the hood the old hinge caught the line and broke it right behind the connection nut. The guy that had the hinge also brought an old assembly, but the line was a different size, so my idea of possibly using a union and making the fix went out the window.
My question is, have any of you ever tried a repair on one of these aluminum lines? I don't really want to tear into the firewall and try and replace the whole thing even if I can find one, would just like to repair or patch this line if possible. I'm gettin' too old for major mechanical projects, the ol' body boycots this sort of activity. Any ideas will be appreciated. Even if I have to JB weld the darned thing, LOL!