Wanted: WANTED HYDRAULIC BRAKES AND SHIMANO REAR SHIFTER

Hi,
Have been trying to buils up a cheep DJ bike, I have most of what I need except!
Front and rear hydrauilic brakes, have the discs allready.
Shimano rear shifter!
A bash guard and chain tensioner that will fit on Saint cranks.
Dont have to much $$$$$ so any help would be really appreciated, thanks!