I do not know but if you will look on the axle it will give you the model number. I assume Lippert makes all of Crossroads chassis products so by calling them with the axle info they can give you bearing/seal/race numbers. Of course the other way is to remove the bearing and take it to your local bearing supply store and they will I.D. it.
I just had to repair my wheel from a burned out bearing. Almostlost the tire going down the interstate. Missed a few service calls to grease the bearings, and it burned up. Lesson learned and money spent.. Ouch