But I would get the one above it, yes roku 3 isn't listed but it would work just fine. Only thing lacking is A & B gaming keys, do you use them? Gaming remote lacks tv controls where the voice remote has it and headphone jack.
Re: wherte to buy Roku 3 replacement remote WITH HEADPHONE support
Are you hoping if you get a hold of remote with headphone jack it for sure would work with you very old model of premiere? I have a newer model of premiere 3920x and headphone jack remotes don't work. Have headphone jack remotes worked for your model before?
In my link above, both the $29.99 Voice remote and $29.99 Gaming remotes both have headphone jacks.