'73 needs new pads, rotors, flexible lines- best one-stop shop?

Rockauto.com is a great source for parts. Can't guarantee they have every single part you need....but it's generally a more enjoyable experience than trying to explain to the 19yr old girl behind the parts counter at your local Autozone (Oreilly, etc. etc.) what you need.

I've found a decent amount of stuff on Amazon, too.