How do you fix this?!

I was getting the dreaded hissing sound from the rear ARB and finally got the cover popped off. Somehow the copper line managed to find it's way too close to the ring gear and got shredded. So what do you do? Can you heat up the brazing and replace the copper line or do you have to squeeze in some sort of coupler. Would brake line work better? I'm thinking more stiff and less prone to bend its way too close to the ring grear. Do they even make brake lines to 1/8 OD? Thanks.
-kelly

First,its a steel line.Second, its 3/16"!