For a temporary repair, just to close up the holes, the person who mentioned pop rivets is right on!! Get yourself a piece of galvanized valley tin from the home center, and a pop rivet tool and have at it! While you're at the home center, pick up a quart of roofing tar. Between it and the tin, you can make your cab weather-tight enough to drive until you get the time and money to make a more permanent fix.
Good luck with your project!
