" IIRC on the 70-71 E body Barracuda/Cuda models it was available in black white, and I believe gold"

That's probable. The '71 Charger had the textured rear window trim available in black, white, gold and green. I've seen several black sets, only seen one white set on a car, and I've never seen any in gold or green. But then, I can't imagine anyone really ordering rear louvers on a car with a green roof.