Jay Leno uses a company in Ontario Canada that can replicate or fabricate from scratch ANY wiring harness you need.....not sure on the cost....but its out there. See his website for details..... (jaysgarage.com)

They will even do custom applications. Most recently he had them create one for a bus he refurbished.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)