I am checking M130:
Inner spring part number is A 130 053 00 22 with a note:
As of engine: 981 10/50,20/60 000012 ALSO INSTALLED ON 000010 981 12/52,22/62 000109 ALSO INSTALLED ON 000005, 000037, 000045, 000053, 000079, 000085, 000088, 000092, 000095- 000102, 000106,
Then outer: A 110 053 01 20 with a note:
ELIMINATE 108 053 00 22,INNER VALVE SPRING FOR MODEL 980,984 UNTIL PRODUCTION STOP,FOR MODEL 981 UP TO ENGINE SEE FOOTN.1
001 Up to engine: 981 10/50,20/60 000011 EXCEPT FOR 000010, 981 12/52,22/62 000108 EXCEPT FOR 000005, 000037, 000045, 000053, 000079, 000085, 000088, 000092, 000095- 000102, 000106, 983 10 004596, 983 12 007229
I do not see any "superceding", I just see recommendation to eliminate inner spring on certain engines.
Both part numbers of the inner and outer springs are available at Mercedes for $10 or less (at least here in Europe). I would not look for them anywhere else.
It is a different story when you talk about M127 for 230SL.
Original part number for outer spring is A 180 053 08 20, replaced by A 108 053 00 20, replaced by A 180 053 10 20 and finally A 108 053 02 20, which was about $50 at Mercedes, but I see it NLA now. All different part numbers than the one you mentioned.