need steel brake line from proportioning valve to front right frame rail

[G-NUT]

Replaced my front left (drivers side) rubber brake line. Tried to replace front passenger side but cannot get the steel brake line flare nut loose, the part where it connects to the rubber line on the inside of the passenger side frame rail. In the processes I've totally rounded the nut. I did use a flare nut wrench. Used it from the get-go. Didn't work so I got an old 3/8 inch wrench and used my Dremel tool with a cutoff wheel to cut out a section of the round enclosed end just wide enough to get around the line. This didn't work either. So I got my small Vicegrip brand needlenose vicegrips and locked down tight as I could get. Still didn't work. (all the while continuously soaking it with PB Blaster) So I plan to cut it off, but in doing so I'll be replacing that hard line. It runs between the inside of the front passengerside frame rail to the proportioning valve. I've been looking around online and cannot find a direct replacement line for this line. Anyone know where I can get one?