a/c evaporator

I put a post on here a couple weeks ago about a/c evaporators. I got some response but only found one place that has the part I need. There has to be more than one place to get an evap. for a 69 cuda. Am I the only one that is having this problem. If thats the case I see why there is only one place to get it and why it is so dang expensive. I have the one that came out Im taking it to the shop to have it checked, would rather buy a new one. Thanks for any input, Tom

engine bay 016.JPE