The wires were originally black laquered cloth with rubber insides and braided "solid" wire. The sparkplug connectors were 90 degree open with no boots. I use the better modern ozone proof neoprene braided wire type. I use a screw type in-line resistor on the coil wire. This cuts down on "motorboating" in your radio and any around you. "Popping" in your radio and transmitting it about a square block around your car was quite common with these old cars. I don't recommend cutting up up-market modern silicone wires ,to make your own,as it's also most impossible to make a good connection. I know this doesn't help with where you would buy them as I make my own from stuff bought at fleamarkets.