Sorry to hear about your misfortune, I often see these parts of tyres sitting around on motorways and think about the dangers - Looks like you got away quite lightly.
It might be best to visit a scrap yard for the parts, I think the black plastic box is an air dam (smoothes air flow) that later goes onward to the air filter, but someone who knows your car will be able to confirm.
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1996 850 T5, now 2010 C30 T5 R Design 
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