-endlinks.... I don't know. I would assume they are the same, but I am not sure...
-bushings... AWR doesn't make a 20mm (Or they didn't when I did mine). They make a 19mm and a 21.5mm. I bought the 19mm and opened them up slightly with a dremel. If you put them on without boring the opening, it doesn't fit right...
-brackets... The AWR bushings should fit inside the LX horseshoe brackets. They did on the P5. If the LX are the same as the P5, then yes. But you will need the AWR mounting brackets. The mounting brackets mount to the subframe, and the horseshoe brackets mount to the AWR brackets...
hope this helps...