It turns out that the polished a-molds that were on my Z when I bought it,
are actually OEM Gm A-molds that were polished at some point in time.
I had the tires dismounted today, so they are ready to go. They are in good shape --
no dings/chunks taken from the lips (tiny area of scoring on the lip on one wheel).
They could probably use a good polishing by a pro -- I lack the skill and time to do so myself.
$1000 + shipping.