Fuel line for feeding turbo

Hello,
Well into my collection of turbo parts for the 225. Trying to do all the preliminary work before i actually set up the turbo.
I am wondering what exactly to use for fuel supply/ return. My understanding is 3/8" for supply, 1/2" for return. I would like to replace the existing factory fuel line only because it is old and crusty, and i think it has served a long reliable lifespan.
Question; what do i use for fuel line? Perusing ebay only left me with more questions. Can i use a heavy marine type supply/return (rubber) ? Steel? Aluminum?
Any suggestions? Would like to do i right the first time.
Thanks