How do you replace 95 Kia Sephia heater core?

....Well... as I have just found out.......you have to pull apart the whole dash... unscrew the steering wheel from the frame... take out the frame underneath the dash.... and then unscrew the heater side of the heater/ A/C unit. Then it comes out pretty easily. I just did it and it took me about an hour. The problem I have now is that I need to find a heater core... which has been a problem. I'm hoping that I can find one at the junk yard that will fit in my car...... and isn't damaged. I hope that helped.