LEGO DUPLO: Airport Rescue Truck (7844) for sale online | eBay
Duplo Trailer Four Rear Wheels, Elevated Front End, 4 x 12 with Blue and White Danger Stripes and 'FIRST AID' Pattern on Both Sides (Stickers) - Set 7844 : Part bb0793c01pb02 | BrickLink
Duplo Panel 1 x 2 x 1 2/3 Sloped with 3 Embossed Gauges with Lever, Buttons, 'WINCH MOTOR', 'RPM' and 'PSI' Gauges Pattern (Sticker) - Set 7844 : Part 6428pb01 | BrickLink