I need help finding a supplier for the two 90 deg. elbow fuel lines at the fuel pump for my '75 280Z.  One connects the fuel pump to the fuel tank and the other connects fuel pump to the fuel damper.

If you do a Google search on the part numbers, you'll get several options here.

 

http://www.carpartsmanual.com/datsuns30/DatsunZIndex/Engine280Z/FuelPumpHose/FromAug-76/tabid/1619/Default.aspx

 

Also look at the post Aug 76 parts, menu on the left.  Looks like the same pump but different hose and tube setup.  More metal, less rubber.

 

You might also try your local dealer.  Surprising what parts they can still get.

 

Also, if you decide to go cheaper and use an aftermarket pump, you can make a loop in the hose to get it to curl around from port to port without kinking.  

Or use FI hose

You can use a tubing bender to put a 90 deg bend in a short piece of copper tubing.  Then push/work the piece of tubing into the middle of a slightly longer piece of rubber fuel line.  It's harder than it sounds, but if you keep fiddling with it, you can do it.