Check with The Filling Station they show wiring harnesses on thier online catalog.
I resently completely rewired a 1954 corvett the harness was purchased from an online parts house. The harness was made by Lectric Limited (708)563-0400 Justice Il. It had cloth covering and was easy to install. It also came with a 3'x 2.5' laminated schematic. $600.00 was kinda pricey but everything on a vet is.

I didn't do it, no one saw me do it, you can't prove anything! "Bart Simpson"