the "SALES CODE" is on the bottom line of the sheet & would be
W21 - rallye wheels

the 58 you found in the "BUILD CODES" section:

#3580058 = 14x5.5" Rallye wheel
TX8 is the spare wheel paint color = "black"

55 = last 2-digits for the spare wheel assembly part # for a plain steel 14x5.5" wheel
24 = last 2-digits for the trim ring #2944424


or do you have an "8" stamped in the "W5_ PAINTED WHEELS" section on the bottom line??