If it is a cable DESIGN you are talking about I would try to find commercially available wire to use. It is fairly easy to make cables in your basement if the ingredients can be obtained off the shelf. I recently purchased a very good arm cable made by an enthusiast who started making them for his own use and found there was a demand for them. Having wire made up to your specifications is going to be a much more difficult proposition and few of the commercial cable companies actually make their own. Making anything complex in small quantities is always expensive, things like Cardas or Siltech are quite complex.