98 tour zetec cat

took the car to a garage the other week. backfire and missing . They told me it was the timing belt and also the o2 after the cat and the water pump leaking. went to pick it upand it was still running the same as before.... They told me it would cost major $$ for them to continue checking it. took it home and it turned out to be a coil. I paid $700 for them not to fix my car!!!!!!! anyways it ending up melting my cat because of the raw fuel that got dumped down it. I gutted the cat but now I need to find a new one. anyone know where I can find one cheap? The coil that went bad was an accel super edis coil that I bought only about two months ago. Has anyone else had this problem with accel's coils? It also ruined my new ford 9mm racing wires. btw I now own my own obd II code reader if any one in NE PA needs to use it. sorry this was so long.