I searched "W108 Moulding on ebay" and there are plenty options... from single parts to complete set: Mercedes Benz W108 250SE 280SE Door Fender Moulding Set with Clips New | eBay

What I´m missing and cant find is the Front windscreen moulding ..

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1972 W108 280SE 4.5
1977 W116 450SEL
1981 E12 528i BMW