Euro spec E-code replacement headlamps are available, for about $100-120 each. I've seen the Euro headlamp assemblies in various sources but the cost is more (I'm thinking $600 a set) and may not be any better than a state-of-the-art Cibie replacement headlamp. Check out http://lighting.mbz.org/
Hope this helps,

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Robert W. Roe
1984 300SD 165K miles