WOW NOW PINK
Now you need the Copper-Brown pair and the Turquoise pair, but the hardest pair to find will be the Charcoal Black pair. I know an older retired MT repairman who swears that he saw a MT all push-button pair in black years ago. The color is not in the MT parts lists so it may have been custom made?, this was in the same time period that Frigidaire and Hotpoint offered some version of black.
For our collection the brown CA900 and CDE750 will have to be sufficient to demonstrate this period of MT washers and dryers. If you run out of space you could do a pair of multicolored machines by using different colored lids, doors, tops, cabinets and front panels to show what was offered at this time period without filling your whole exhibit space with very average performing machines.