I am looking to Purchase an exhaust manifold for a 2005 Scion Tc Would the Monrovia location happen to have the part available?

Your best bet is to spend $3 and look yourself. No one over the phone, on Google or online listing will let you know with 100% accuracy

""" THEY MAYBE HAVE IT ,, YIU CAN GET INTO GOOGLE , CHECK LKQ MONROVIA ,, AND YOU CAN FIND OUT IF THEY HAVE THAT CAR OR NOT , WHIT TAT APLICATION YOU CAN CHECK IN ALL PICK U PARTS ALL OVER UNTILL YOU FIND IT WHERE THE CAR IS , SO YOU DONT WASTE YOUR TIME BRO....