Not sure exactly what year these are off of, but I've got a matching set of W123 Wagon tail lights, in pretty good condition for sale. There's one decent size scrape on one of them (pointed out in one of the pictures), otherwise they have some light scratches. I haven't tested these, so presumably they're going to need new bulbs and such.
$400 for the pair plus shipping from KS
photos here:
https://www.icloud.com/sharedalbum/#B1g5Uzl7VBo8ZJ