OK, just got off the phone with my local dealer parts guru.
The only covers listed for SS as service parts are the
92193905 & 92193906 "paint-to-match" version, as mentioned earlier, same as for G8.
This may or may not put this question to bed, unless or until someone pops off the cover on a black SS to see what the underlying/interior markings and color of the molded plastic may be.
Even if unpainted black covers
may actually be used in production, which remains as the underlying question, it's not a given that those parts would be listed for service (
92193907 & 92193908).
There is a PBM SS at the local dealer (
Bill Holt Chevrolet Canton GA)
<click to see car - it has been sitting outside and not driven for so long the rotors are heavily rusted--same car I was able to post
underside pictures of back in November, and the only
SS the dealer has had to this point.
I'll take my camera and see what can be revealed once the sun reaches that side of the building. This car has had window tint and carbon fiber overlay on the Bowtie(s) installed.