"Same colors" Cheyenne Super trim

[SS Tim]

The brochures for both 71 and 72 Cheyenne Super trim (RPO YE9) show the availabe cloth/vinyl interior choices as;
Blue (610)
Olive (632)
Parchment(626)

In addition bucket seats (A50) could be ordered with the Cheyenne Super trim.
Both years specifically state "Same colors" as the color choices for the all vinyl bucket seats in a Cheyenne Super.
These would be the same trim codes as found in Cheyenne (RPO Z84)
Blue (508)
Olive (530)
Parchment (526)

However Cheyenne's also offered two other colors;
Black (502)
Saddle (616)

The question is, does anyone have documentation showing that the Black or Saddle were offered in a Cheyenne Super?
Specifically this would include;
Truck data book trim description page.
Data book recommended trim/paint chart like the Blazer's below.
Sales or service information publications describing the YE9 option.
Option printed dealer order form.
Build sheet
SPID that is uncontested (none in my collection).

Often I will see a truck for sale with known conflicting options or fantasy replacements (like a red houndstooth bucket seat set).
The black brings up the question to mind most often. If black buckets were not a factory option, then a truck would have had them added as a trim color change or be an upgraded Cheyenne.

Any help you can provide would be appreciated especially trim cards for 71-72 Chevy pickups.