W126 Headlights in a W124??? Am I screwed?

Hi, I’m afraid that I’ve made a newbe mistake. I bought some DEPO headlights off Ebay a few months ago for my 1989 300E, and I’ve just gotten around to trying to install them. Right off I notice they are much different than the stock lights – so I went back and checked the Ebay ad. The ad says they are fit the 1989 300E, but it also says the lights are for the W126 Mercedes, not the W124. When I bought these I didn’t know the difference, so I just went by the fact he said it fit the 300E. The deadlight shape is different, and I really wonder if these will work. It’s way too late to return them – am I screwed? What are my options? Any assistance would be much appreciated.