Don't know if you guys know of this, but I thought I'd share.
I went with my wife to the craft store tonight and found a great source for tin wire. If you go to the beading section, they have spools of wire from 18 to 34 gauge. They come in different colors but not all colors were avaliable in all sizes.
I haven't used it yet, but it should work great for wire looms, hoses etc!