I bought a pair of these brand new and then found a super deal on aq complete teardrop, so I don't need them anymore - Asking $175 plus shipping charges. They come complete with the 5 bolt on 4 1/2 inch circle heavy duty hubs . . . . the genuine article from Fexiride and not the generic ones Southwest Wheel sells
http://www.southwestwheel.com/store/p-2317-1400-lb-torsion-half-axles.aspx
The torsion arms are heavy castings and are adjustable so you can set the ride height of your trailer with them, plus they also have the holes for adding brakes if you should decide you want/need to do that
Details here: http://remarque.org/~rob/td/Flexiride_Half_Axle.pdf - Look under the FR-1400-B column
Don