i was in my local NAPA the other day, and had rather confusing discussion about fittings. Once I mentioned the British LR, he walked me over to a store display that did in fact have lengths of steel brake pie with the proper fitting on them. He said they also have the fitting in stock. I have a nice brake flaring tool, and I'll keep an assortment of fitting and some line on-hand, but it's nice to know NAPA has something in an emergency.
I already ordered some Fedhill fittings, but I did pick-up 25ft. of the NAPA copper-nickel brake line - on sale for $40! Might be a good time to get it or stock-up.