You can also get individual taps and matching drills from your local hardware store. If you only need a couple of sizes, that might be cheaper than even going to Harbor Fright for a set.
Vector used to make a "bus strip", perforated on .2" centers, for adding power busses to wire-wrap boards. Not sure whether they're made of copper or someother metal, but they're nickel-plated, and much heavier than a standard PCB trace (I'm guessing at least 2-3x). They're good for soldered "bus bar" use in LED arrays and such. Dunno if they're still available.