Dash Harness Repair

I'm about to make some repairs to a 68 Dart dash wiring harness. Found some great informational threads here on the proper type connectors, so I have ordered those. Question is what type of wiring is best for replicating the OEM dash harness? I have read some threads mentioning TXL, GXL, and SXL wiring but I'm at a loss as to what would match the original, and where to buy it online.