I got my 2 x 1mtr of 15x30 with ends from amazon(warehouse) sells off returns and damaged packs, just keeping a watch for same, cost me £2.50 mtr rather than normal £10 they seem to come up regularly. Printing for a few wires is simple for printers lasers but with the amount and type of cables involved strength will be an issue with 3d printing unless you make it very bulky.