I would just take a hub off of it and take it down to a Napa or similar parts store in your area and they can figure out what you need. Many times identifying the trailer does not lead to getting the correct parts. Trailer manufactures use all different types of companies when they are building trailers. I have seen trailers from a manufacture, same exact trailer with these different companies axles on them, they used what they could get for the best price and changed mid stream production to keep the line going.