Thank you your purchase of the ASC1! Call if you have any questions.
The least expensive route would be to purchase off the shelf items from a local home supply store.
The sensor and servo circuits each need a shielded bundle. For each of the two circuits, check out using a length of security cable (3 conductor with shield/bare drain wire,18-20g, stranded). Sold by the foot or in rolls.
For motor power, check out low voltage landscape lighting wire (2 conductor, 12-14g, stranded). Sold by the foot or in coils.