Stop in for a cup of coffee

Car stuff.
Worked a little more on the car today. There's a couple places where the wiring harness had factory supports that are missing on my car. This surely caused some strain on the field wire and the ignition wire. Hey, ignorance was bliss.
Now I'm looking for any information or pic on how the wires were retained, especially the main harness from the firewall to the brake fail switch on the frame rail.
It looks like there should be a coated metal retainer on the firewall-cowl lip. I'm hoping this is a clip on? If so, ever see one for sale?

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On my ‘69, it’s a hangar that screws onto the fire wall and hangs against that indent...

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Here's a picture of Eddie's 69 Dart 340 GTS... It looks like the clip was painted, but matches the ones the have been posted...

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