Traps

Hey everyone, i just started replaying the game after not touching it for a few years, can someone help me find the easiest way to stock up on traps and meds? I only just unlocked iron mikes camp yesterday, im on the mission where you face a breaker for the first time and im having a lot of trouble with it, i can consitently get it down to ab 1/3 of its health but havent been able to get past that. I Just needs some tips/trucks to beat them or at least easy ways to stock up on supplies before i attempt again

I use an m40 for special, ak or aug for orimary, and lil stubby as a secondary