Radio Shack wrapping wire is cheap and plentiful for plug wires/battery cables.
http://www.radioshack.com/product/index.js...oductId=2062640
Comes in red, white and blue, and can be painted if you need to.
As far as hose clamps, I just cut a thin strip of BMF and wrap around the hose to simulate a clamp. If you're REALLY frugal, I'm sure a thin strip of tape painted silver would look just as good.