We had Star City Teardrops build a trailer for us. Tim Miller is a super nice guy who has a business building teardrops to order.
His basic trailer design is welded aluminum with torsion axles. He put storage compartments under the bed of the trailer. He also put the battery compartment under the trailer between the wheels. We were very interested in picking up some storage space without adding a lot of weight. Also, moving the weight of the battery to a lower position off the galley flat was a desirable feature.
He is based out of Roanoke, VA. We went and picked ours up but he does have shipping capabilities.
starcityteardrops.com