Please consider that since your light has cracked, dust and water will now seep through the crack and get inside the light. Over time your light will become dark and start to look dirty.
Changing the cover isn't an option, the only option is to change the entire light assembly. You can get one from the used parts market. It will be expensive but that's what you have to pay for maintaining a JDM car.
Also thank Allah that your loss is very small...it could have been much worse... this is a small sadqa which saved you from greater loss. May Allah always keep us all safe.
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