Thanks everyone for your thoughts. I have been checking ebay for months, and Lemfoerder/Lemforder seals don't seem to exist for the w115. There is a vendor selling some from Turkey which have received poor reviews here on PP. There is also someone selling some from Thailand which I know nothing about. But for the most part, it is URO, Meyle, or Genuine.

Call me crazy, but I think I am going to give URO a test run on one door and see how it goes. I found one for $30 shipped, so it is a pretty cheap experiment. I am going to try it on my rear left door (where my 1 y.o. daughter sits!), figuring that it won't get as much use as a front door. I will report back in this thread once I have it installed to let you know how it does. I just installed a used Genuine seal on the right rear door (my son's) from the junk yard, so I have a sense for how the installation should go. If the URO is much more difficult to install or not shaped right, I will let folks know. Of course, this would only apply to the w115, but perhaps would be applicable to the w123.

Gerryvz, I am sorry for going to the dark side by putting my first URO part on my car. I promise to never do so for any mechanical or structural part. I have already been "burned" by Meyle suspension parts and no-name exhaust hangers.

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).