I installed access covers on each side of my tunnel to ease access to my fuel pumps. I made a custom mount for my Andair fuel selector valve, drilled additional holes for a fuel return line, created a mount for my SDS fuel pumps, installed the pumps and then formed and installed all of the fuel lines.
There are some folks, probably many, that have bought premade braided hose kits to do the fuel lines, which are probably excellent, however, I just don't think it's that hard to measure and bend hard line, and then leave flexible lines for those situation where vibration is involved, such as firewall to engine. I have Imperial tubing bender and flaring tools and highly recommend them. It's pretty straightforward to create your own lines, just need a little patience. But considering the cost of premade lines, I probably earned/saved about $100+ and hour making my own.