I picked up the kit from AC with the Bilstien/KYB's... as mentioned above, you may find it cheaper if you source the shocks/struts yourself.
As for the bumper, ARB makes (made?) them for our trucks, as well as KMA. http://www.kenmtn.com/ A warning regarding KMA, they have really long lead times, and I have heard mixed reviews regarding quality.
There's a pinned topic in the R50 section where members have posted what mods (lift) is on their truck, and what tires they have been able to fit - I would check that out.