Breeze Automotive has pre-formed brake lines. I've not seen anyone offer pre-formed fuel lines. Wouldn't be easy. Lots of different sizes, whether you need a return or not, plus variations in where the fuel line best enters the engine compartment depending on the engine and fuel pump setup.

I'm actually a little amazed at the lengths people are going to avoid having to do flares. I know it's not cheap, but the Eastwood tool makes perfect flares every single time. Harder in stainless like I've done. But with standard steel line you can get perfect flares the very first time. Just couldn't be easier. I know at $200 it's not a cheap tool. But it will keep on giving long after the build. Or sell it on the forum. They come up every once in a while and immediately get snapped up.