Hello and sorry you're having problems. The remote for your Panasonic DMR-ES15 is not available as NEW from any sites. The only source for the remote are for used items at Amazon at the link below:
Or the other option is a pre-programmed "generic" remote that's already been setup with the codes for your player- and offers full functionality- unlike standard universal remotes. That unit is at the following link:
If you need further assistance let me know. Please do not forget to click the 5 STAR RATING, at the top of the page for my efforts. It is my livelihood and you can follow up at any time if needed.
I was also able to locate two of those remotes in NEW condition at the link below for just over $10:
That last link is from China though- so it would take a bit longer to receive the remote. Other than that those are the only three options I could find for you.
Please do not forget to click the 5 STAR RATING, at the top of the page for my efforts. It is my livelihood and you can follow up at any time if needed.