66 300 convert right rear power window regulator question

hey guys,
im helping a friend out with his 66 300 convert.
he discovered that the passenger rear power window regulator is not there.
what other years/body styles will interchange ?
am i right in thinking 65-68 ?
and will a coupe 1 work or are these convert only ?
i will post in the wanted section when i know more specifically what to search for.
or anybody have 1 ?
tx
mark
Author: marko