sc300 parking brake?

[jeffpsc300]

all sc300 owners, need some kinda help.. have you ever change your parking brake? i swithced up to a cross drilled rotors on all 4 sides, and discovered that there are 2 brake system in the rear which is a rotor and a drum inside, my parking brake was kinda got f** up coz the spring retainer that holds the shoe got loose and got pinned inside, i got it out after 2hrs.. lol.. but im trying to find the brake shoe and nowhere to be found, went to autozone, adv auto parts etc.. and they dont have it in the records? i need to find one. if anybody knows where to find em hit me up.. or if anyone know conversion for it.. thanks..