Pulled off a front wheel for the first time today on my 79 SD. There was a sheet metal brake dust shield between rim and hub. Nice feature. It's almost impossible to keep the wheels clean on my 85TD without the shield. Are these shields OE or aftermarket? Any opinions on adding them? Are they available anywhere?

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13