I don't remember how I found the right ones. But you can call Fleetwood parts and ask them if your headlights have the same part number as mine. They won't tell you the Ford part number but they should be kind enough to tell you if they are the same. If that fails Amazon will accept returns especially if they don't fit. The price is so reasonable and they are so bright it is sure worth it. The mounting frame that FW fabricated leaves a lot to be desired and you'll probably have to get creative to get them to adjust up. What I did was park the Jeep and MH side by side about 30 yds from a wall and made the adjustment on the MH.
You will not regret getting this done they are so good I didn't bother putting in the silverstar ultra bulbs in.
If you feel you need more info PM me.