I would contact the body shop that did the work and have them do a supplement on the claim. They matched before the accident so they should still match! If they have to replace a tire they do it in pairs so I would see no reason they should not do it for the lights. Have the shop mention that is could be a safety concern as it could cause uneven light output. (not really a safety issue but that usually gets the insurance company moving!) I would have them change the bulb as well while they are at it. It is worth the time as it would save you the parts and the labor.

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Currently
1991 Mazda Miata 174000
1991 Subaru 189,000 Winter beater

got rid of:
1984 VW Vanagon 195,000
1976 350SE Euro 185,000 KM
1973 280SE 4.5 (boy do I regret that)
1980 280SE European W126 4 speed manual (miss it)
1989 BMW 735iL 119000 (good riddance)