Evapoator core needed

Unfortunatly I learned today that the core is leaking so I've got a big job ahead of me. Where is a good place to get a new one for a 72 Skylark?

Thanks in advance.

 

I have some pulled from parts cars if you are interested.

 

The job is not as big as you might think ,I found mine on ebay New for $99 oem .