Fuel line solution for NA to WRX swap

[Muffin15]

Hey all!

I'll be swapping a full STI longblock with all 2006 WRX supporting bits (electrical, turbo, brakes, etc..) into my 06 NA real soon here. The WRXs have the third hard fuel line in the cabin that NAs do not, I believe the high pressure return from the rails. What have people done to add a third line? I've had no luck searching threads, unfortunately.

Options I've thought of:
1) Buying new fuel hard lines for the cabin, but these do not seem to be available on rockauto. I suspect these are near-impossible to remove/install without damaging, either, as it looks like something that's installed before the shell is completely assembled.

2) Doing up some braided 6-an lines/fittings, which seems perfectly doable, but not without also buying an aftermarket fuel rail to allow the lines to mate up with the rail lines

Any thoughts? I'm prepared to purchase rails and 6-an lines/fittings but just curious if anyone else has had any other solutions. I'm a bit skeptical of the durability lines sourced from advanced or o'reilly's

-John