Help! How do I find discontinued fabric?!

This chair was my grandparents that they got as a wedding present and Jake and i inherited it when we got married.  

 I love this chair, especially the fabric.

It's a very creamy yellow with vintage yellows, greens and blue-ish grays.  

But it's showing quite of bit off...love...and I really want to reupholster it.  

Ideally I'd love to find the same fabric, or something really close, but I have no idea if that's possible. 

So can you help me?! 

 - How/can I find discontinued fabric? - 

- Does anyone know anyone to contact who might be able to help? - 

Any advice you have would be awesome!!