Climb under the front of your coach and look at the back of the headlight housing. There'll be a part number. Google that number. It's very likely that your headlights are from another vehicle. On my 2009 Mandalay 43A, the headlights are from a Chevrolet Avalanche and the driving lights are from a Ford Excursion!
2009 Mandalay 43A
2009 Honda CR-V Toad
2011 Toyota Tacoma
2013 Honda Goldwing
2003 Honda TRX400ex (2)
2005 Honda Aquatrax F12-X (2)
2016 Yamaha YXZ1000R