What is best Roku Ultra earphone replacement

The wired earphones that came with my Roku Ultra had the best audio clarity (for dialogue)  I have encountered.
Now they have broken, and no longer can be purchased from Roku.
Has anyone found any commercial (budget) earphones that can compare?
Or know who the supplier was for Roku, and whether they might still be available as a private brand?
Am disappointed in Roku support for ending those earphones' availability.