1972 Duster, 340/4, black on black (the endgame)

My uncle special ordered a new '72 Duster 340. It included a 4-speed and rallye gauge cluster. It never came. He took a stock car off the lot; AT and standard square dash. The fact that I've never seen a factory '72 340 Duster with the '70-'71 Rallye cluster, and the fact that his special order '72 Rallye cluster car never came in, I have to wonder if any were ever made. My uncle suggests it was on the option menu when he ordered his.