You have lkq as the most reasonable ,theyve become more internet friendly ,search the model and a list pops up , the car with pick and when it entered the yard ,no more guesses ABOUT IF ONE MODEL MAYBE SITTING WAITING TO BE PICKED FROM ,mb w123s are getting scarce www.lkq .com.If the post shows a car that entered 6 months ago ,of coarse the bones have moved onto being hub caps .
Wallisville ,northville and one on the south side ,hiram str. I believe is the name of that one.
Their is lonestar which has some of the w123 models ,research through www.car-parts.com should get a few for your fishing venture.