Question on 91 stock cherokee
 

I live in Iraq, the area I am in it is almost impossible to find new jeep parts. I need to replace the suspension and brake lines. For the suspension, is it possible to use any 4x4 suspension that will fit it? Also what years are the same for the brake main line. We just threw a v6 in the truck and managed to puncture the brake line getting the engine to fit and while we are driving it still, it' a bit dangerous in the mountains.

it' a 1991 jeep cherokee