Mel Gibson wanted Donald Trump to appear in his next movie, “How I Spent My Summer Vacation” — but Trump politely declined. “The problem is the movie is being shot in Mexico,” said a source. “Aside from the major security concerns in the country, it would take a lot of Donald’s time.” Gibson, who doesn’t give up easily, followed up his phone call by sending the tycoon a script with a note, “See page 78.” Mel also wrote: “Hey baby! Sorry I’m speaking Hollywood! Hope you enjoy. There’ll be no rough stuff. We’ll use a double.” IMDB describes the action/drama: “A career criminal (Gibson) nabbed by Mexican authorities is placed in a tough prison where he learns to survive with the help of a 9-year-old boy.” Trump would play — who else? — himself. Gibson co-wrote the movie, and his Icon shingle is producing.