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I imagine the parts you need are spendy if you source them from the dealer. I would check the junk yard used parts availability. There is a national search engine available online for finding what you need.
Wow ! It looks bad. You will probably have to replace all things that related to that headlights. While you are there, it’s good idea to check and replace all connectors that have been corroded. Try the salvage yards in your area for parts.