Try Tyree Wires in Bumpass, Virginia. Tyree retired but I heard his son took over the business from him. It may be possible that his business passed to another person Chris Olsen 541-410-8929. I got all my original-style 1935 truck wiring from Tyree and it was perfect.
As of last year Edmund Pease was still in buisness. His company Precision Wiring was split off from Narragansett. He made some custom cloth covered wire for my generator restorations last year. His email is precisionwiringinfo@gmail.com. He sets up at Hershey too.