I got my axels through Andy at Inland RV the were very helpful and walked me through it. Shipping is a big cost, so don't pay for it twice. If you opt for the steeper down grade to raise the trailer, dexter will not weld the shock brackets on. If they are shipped from the dexter factory to you, expect to have to weld them on. If they ship from Andy's place they will weld them on before they go out.
Andy feel free to jump in and correct me if things have changed.
Not all those who wonder are lost.