Reply to "OGR 14-Guage Model Train Wire SKU: wire-14wxx"

The wire I found that is similar to the OGR wire was sold as 14-2 or 16-2 speaker wire.  It came with the two conductors in red and black, the same as the OGR wires, and with both inside a PVC outer jacket that was usually a different color but otherwise similar to the OGR cable.  You need to make sure the conductors are stranded copper and NOT CCA (copper covered aluminum).  I got mine at a big box store.  I see it is no longer available there, but you can google 14-2 or 16-2 speaker wire.  Longer lengths usually come in a "payout dispenser" box.  You'll see other kinds of wire but it is not hard to find the varieties that are similar to the OGR wire.