“Furious” over a recent exposé in The Hollywood Reporter , Oscar winner Kevin Costner has gone deep-sea diving in search for sunken treasure — and a hit — a source tells Page Six.

A source told Page Six this week of the “Yellowstone” star, “Kevin Costner is on a deep-sea diving binge to discover sunken treasure.”

The insider added: “He found gold coins and emeralds recently in the Caribbean. Now he’s shopping a TV series on finding sunken treasure around the world.”

But, “no one has signed on to finance it,” citing the star’s cold streak around town.

The THR piece alleged that Costner has had a “long series of unfortunate incidents” in a career “marked by feuds, walkouts, lawsuits, financing fiascos and a growing reputation for being, as one former colleague put it, ‘impossible.'”

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