As far as I know, those are the SkyKings made for Skyjacker by KING shocks. From the photo it looks like that brass colored plate would bolt to the spring hat and then accept a mounting bolt that goes through the top shock eye.
For the same price, you can get the KING coilovers, which are adjustable like the Sway-A-Ways, but have the adjustment collar and schrader valve at the top of the assembly, rather than at the bottom. They have a 2.5" shock body.
www.kingshocks.com