most std fuel line, 5/16" can be obtained from the clutch and brake shop. I found the steel stuff hard to bend, u may need to heat it gently, and beware of collapsing the tude ID in tight bends.
When I upgraded to 3/8" lines I found I had to use copper (no steel available), altho u can get stainless stuff from
http://www.vpwmailorder.com.au (i found this after I completed the job of course).
copper is easy to use but looks horrible.
I also got a tube bender and double flare tool from my local tool shop fpr about 120 bucks.
As nicko suggested use welding rods to template the more complex stuff.
Cheers
Ed