no wire, just a block of copper
There are metal supply companies which sell copper and copper alloys in a whole variety of forms: plate, sheet, wire, billet, big chunks, little chunks, etc. You will probably find that the cost to make a chunk into the shape you want is more that the cost of 1 lb of Cu. This companies typically sell hundreds or thousands of pounds at a time. Check out google or yahoo and search for copper supplier, plate, bar, etc. If you are less picky about exactly what the Cu alloy is and what shape it is, you could also try your local scrap metal dealers. They might have something lying around that would work for you. good luck