It’s a good time to be a private investigator in the greater Los Angeles area. Two of LA’s prime paparazzi targets Britney Spears and soon-to-be ex-hubby Kevin Federline are in the market for digging up a bit of dirt and instead of just grabbing the tabloids, they have decided to turn to detectives a report from The National Enquirer claims in this week’s issue that is on newsstands.

They both have launched an all-out war and the report claims that both are hiring private investigators to dig up new bombshells to use as weapons in their custody battle, the magazine reports. At stake are millions of dollars in support money and custody of their two boys, Sean Preson, 22 months, and Jayden James, 10 months.

Kevin hired his private investigator last March - as soon as alleged alcohol-abusing Britney came out of Promises Treatment Center in Malibu, revealed a source. Among devastating charges, Kevin claims his spy has caught a booze-swilling Britney sleeping with a rehab buddy and her drug counselor.

And Britney claims her husband has turned his home into an orgy pit- even when their two youngsters are there. The singer recently made a last-ditch effort to put her shattered family back together- and desperately tried to reconcile with Kevin. But he resisted all her Humpty-Dumpty repair efforts.

Then several weeks ago, they got into a furious fight over the phone. He claimed she was drunk- and she tore into him, said the source. “Through tears, she told him she knew he was having parties at the house while he had the children and sleeping with his ex-flame Shar Jackson.”