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The good news is, Epson has released an ICA driver for that model of machine, for usage on el capitan.
Now, we just need to download it, install it, and get it working. You can download the ICA driver from this page.
make sure to expand the driver list and download the ICA driver itself.. Then install it.
This should get your device functioning as a scanner again, test with the image capture app to see if you can scan. ( after installing the above driver of course~)
if you run into any issues, let me know. And if you would prefer to have me connect to your computer from here and Install and configure the scanner for you on screen we can arrange that.. Just send a reply saying " I want remote support"
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