Thanks for the advice.

Short term I am going to try to patch it but long term I am going to replace it.
I just have to wait until a 91 to 94 stealth shows up in the local junkyard.

Compression fittings probably won't work on metric lines but I may be able to get a flare and union to fit.

I would make another from scratch but metric tubing in that size is hard to get locally. Brake line sizes are easy but that is about 5/16 to 3/8 tubing just in metric.

If it is just a return line and no pressure I could actually just clamp rubber tubing in place of that section.

I won't start it until next week because this week is finals but I am hoping to get it done fast. It drips on the exhaust and stinks terribly.