Mel Gibson — a butt of Seth MacFarlane’s Oscars monologue — isn’t just partying in Miami. Sources said he’s also on the prowl there for independent backers for his films. We reported Gibson’s been seen this month in South Beach clubs with the likes of Leo DiCaprio, Jonah Hill and a Saudi prince, but few could figure why the disgraced star was staying in Miami. “Mel’s shopping a project, or group of films, to investors,” explained a movie insider. But the former box-office champ hasn’t been in a buzz-worthy film since Jodie Foster’s mangy “The Beaver,” which made a pitiful $971,000 in 2011. Gibson’s rep told us of his Miami visit: “There are business reasons that will remain private at this time.”