can anyone confirm for me when the remote controller on this mirror went to rolling code transmission?

i ask this because i have a 1997 model year[assembled 10/96] where the mirror seems to be single code only.

yet i understand that sometime later in the 1997 model year codes, the mirror remotes accommodated rolling code signals.

does anyone know in what month of 1997 model year production that upgrade occurred. and did that upgrade result in a different mirror part number vis a vis the non-rolling code version?

also, would i be correct in assuming that the rolling code version mirror could replace the non-rolling code version without any difficulty?

even better, are the rolling code transmitter components available for purchase and can they be substituted for the non-rolling code components in an easy and straight swap?

all ears....