AGPTEK makes decent and affordable MP3 players that still have buttons, and the battery life is really solid (~40 hrs!). I think they also use a dedicated MP3 player OS rather than an Android reskin. That's my recommendation if you want a 2007-style MP3 player with more modern hardware.
I looked that up. This does not have the smooth textual UI of an iPod. It does seem better than many things. AFAICT those are buttons in a circle, not a jog dial, which is the key affordance.
I'd be awesome if ModRetro made an mp3 player that mirrors the iPod similar to the Chromatic's GameBoy.
I had a few. They advertised ogg support but it didn't actually work. The directory ordering was random, and it would lose metadata or not show tracks with non-ascii characters in the filename. It didn't remember position on stop. IIRC the sorting didn't work either. The buttons were awful, it felt cheap. It was typical Chinese manufacturing slop. But it had solitaire or some other game installed.