radiators are fairly easy to replace. Takes about two hours on the weekend for an amatuer.
get one from autozone or a local cheap parts dealer. Do it yourself. Or if getting under the hood scares you it should cost $200 at the most unless a mechanic is trying to milk you.
When I bought my acura used it had a plastic radiator! lol at least I put a good one in there for about $100 total.
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