I can probably help with the wire. Let me know the gauges, respective colors, and amount necessary. If any will be exposed to sharp edges or exposed under the car, these should be a heavywall insulation.
Commercial vehicle grade wire is usually of GXL (std wall) or SXL (heavy wall). It is a high carbon content wire and is VERY good for temp. and under vehicle exposure. The insulation is a bit more rigid or stiff than the more typical GPT grade of automotive wire insulation.
Thanks for the heads up, funny enough was just watching his youtube channel and he mentioned he was posting it for sale.Not sure if you've seen this post in the Classifieds (or if you're willing to pay that much): https://www.mustang6g.com/forums/threads/fs-dsc-suspension-controller.138665/