You could buy any number of learning remotes and learn the commands from your original remote. Be sure to buy one with enough memory to learn all commands.

It's also not clear if you already have a universal remote, or if you're looking for a new universal remote. If you have a remote, what kind is it? If you're looking for a remote, what are your requirements?

It might also help others here to know the brand and model of your player. I did a search and found references to both "Mathis" and "Mathes" is this a typo?