You should not need a "Special" circuit breaker, if what you are looking for is 120 volt A/C over current protection. Most common snap in breakers found at electrical supply houses and maybe even the home improvement stores should have them. Take one with you for comparison and you should do fine.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7