Other than getting rid of them (not needed with FI), SS or teflon lines from Tom (above) is your best bet.
When you have copper it's not if they'll fail but when.
Oh yea, never use copper line in between the primer valve and fuel supply, if that line breaks you'll be spraying fuel everywhere when you turn on the electric pump or be sucking air into the engine pump, neither one is good for your health!
Copper lines are a pain. We switch them over to stainless braid teflon.
Tom