I had to go look to see what the fuel lines are like on SN cars...
If I'm picking up what you're putting down and the above image is correct, I don't think you will be able to just replace the soft line. They are swedged. Now, there might be an aftermarket fuel rail kit that has a provision for cutting into or replacing that soft line but I don't know that.
It might be worth your effort to look at the entire fuel line in your car and see if there might be more wrong with it than just the soft line. If so, might be time for the whole dealeo
I myself was planning on replacing all the fuel lines that are rubber because they are aging. I came across this video that you might find useful. It lists what fittings you need.